Obviously Elliot was half-Asian himself. Many, if not most, Half-Asian men are extremely insecure about their Asian heritage while being overcompensating by stating that they’re all “so hot,” demonstrating extremely arrogant views on race. They also inherit the “je ne sais quoi” of the white dad / Asian mom “dynamic.” You know what I’m talking about.
It’s extremely common to see anti-social, physically unattractive and sexually-desperate non-Asian men (i.e. incels, MRAs, MGTOWS, right-wingers, anti-Semites, conspiracy theorists, autists, etc. – men who lack certain qualities to ever be truly desired by women and develop controlling, overcompensating, right-wing beliefs) mock Asian men as being the only thing beneath them, while simultaneously chasing or lusting after Asian girls as their way to “feel big,” after being rejected by white women (the same ideal woman that Elliot yearned for). Every “incel” website – de facto or otherwise, loves mocking and degrading Asian men, while fetishizing Asian women as an alternative to white women, and claiming that half-Asians are all “hot” – as a benefit and justification of their pathological racism. They also conveniently tend to forget the extreme racism and stress of being Asian in most non-Asian societies – the constant jokes, passive aggressiveness, racism, and hostility,  (and now, in 2021, violence) even coming from insecure Asian women looking to integrate and undo their own self-loathing by attacking anyone who looks vaguely Asian. Elliot Rodger was naturally what happened when an ugly white man and a self-loathing Asian woman had a child – one who was extremely insecure about his Asian heritage. His mentality – one of white supremacy – self-loathing, crippling insecurity, hatred of Asians, and overcompensation and extreme arrogance (“i.e., hapas are all so hot,” “hapas are master-race”), which is patently untrue and exceptionally superficial and racist; and this creepy, cringe-inducing obsession Hapas have with focusing on specifics of their white heritage – (“I’m Scotch / German – Taiwanese,” etc) is extremely common among biracial Asians with Asian mothers. The societal-level fetishization of Asian women by a certain subset of weird, physically unappealing, and racist men, and the corresponding demonization of Asian maleness is far too volatile to produce anything but sporadic and radically unpredictable results.
Many racist white men and men in general feel resentful of or rejected by white women, who they view as being “feminist sluts” who will “divorce rape” or “sleep with black men,” and in turn fetishize cutthroat, asexual Asian women as “submissive, traditional, honest, chaste, clean” women who will never betray an ugly white male – i.e., a male rejected by white women in a sexually liberated society in which white women are no longer forced into economic-transaction relationships with men. The hapa children, as a result, inherit their father’s social dysfunction, white supremacy, racism against white women and people of color, despite being biracial himself, and we saw how Elliot Rodger sought to mass murder only white women and Asian men, as his expression of power dynamics and superiority / inferiority complex inherited from his parents.
Like most half-Asians (or most insecure men in general), he believed in the racial-sexual hierarchy imposed on him by society and his own parents; e.g., that Asian men are inferior, white men at the top, white women the ideal, and half-Asian men all “beautiful,” entitled and deserving of women. His own parents, like most Asian mothers, make no attempt to explain away the massive marriage disparity, fetishization of white male power, and the correlated fetishization of Asian women. Hence, virtually every MGTOW, MRA, far-right, or incel space has a bizarre hatred of white women and a simultaneous fetishization of Asian women as the only “honest and predictable” women. Elliot was raised to be a “replacement” white man, by a white MGTOW and an Asian woman dreaming of integration into the economically superior west, to whom not love, but social and financial survival, was of most importance. Much of his pathological view of the world was centered around western, capitalist belief that money is necessary to have women, that white men were supreme, and that Asian men unworthy of even living – and to Elliot, his Asian blood was so reprehensible in his pursuit of white women that he needed to annihilate his Asian roommates as revenge. Many if not most half-Asians with white fathers and Asian moms are raised to hate their Asianness, identify as white, and see that ugly, unattractive white men are better than Asian men in every way, that Asian women are “almost white,” and are a good “replacement” for pesky, feminist, demanding white women. Whiteness – assimilation – and power, as well as “revenge” against being subjected to the low-status of being an Asian woman, are the guiding principles behind Asian marriages. Ironically – most if not all half-Asians are subjected to the strongest anti-Asian racism by their own vicious Asian mothers, and overcompensate to act “extra” white,  a dangerous path to go down for mixed people, especially who bear the stigma of Asian blood. Being an Asian or half-Asian man renders you a target for endless mockery, while our female counterparts are sexualized – ironically by the same racist losers who have a problem with white women – for rejecting them. Not once, in the entire history of very frequent and very well known alt-right white men + Asian women having children – was this ever discussed, with half-Asians being raised as “hot” men and women who would be able to coast by on white privilege, despite the majority of half-Asians being average people subjected to the horrible, constant racism against their Asian halves, and very, very few of us able to, or willing to, pass as white.
Their Asian moms, hellbent on marrying simply for social standing and to have “whiter” kids and to overcome their own resentment at their own Asian faces, ignore rampant racism (and more often than not contribute to it) against Asians in society, and their fathers, oftentimes unattractive, low-status, undesirable racists themselves who fetishized Asian women as anti-feminist alternatives to those “nasty” white women who rejected them for being ugly, and enforce a system of anti-Asian rhetoric to make up for their insecurity over being in a sexless marriage  – send many if not most half-Asians down a nihilistic, dangerous path towards white supremacy and self hatred, through which they want to achieve their parents’ ideal maximization of whiteness.
Most non-Asian men who “like” or “prefer” Asian women are racist against Asian men, due to being so low in looks, social standing, or any other quality, such that they feel Asian women are their only possible way to fulfill their sexual / ego needs. Virtually every incel, MGTOW, MRA, far-right, conservative, or de-facto pro-white, or even liberal etc., website is inundated with racism against Asian men as their last ditch in feeling less pathetic in their position; needing a psychological safety net to make sure that these ugly men have someone beneath them. They give literal zero consideration to the burden of being mixed with Asian in a hyper racist society, particularly one in which Asian women are hell bent on escaping their own insecurity by marrying bottom of the barrel white men, who in turn hate Asian men, the only thing they feel beneath them. Many white men involved with Asian women, bothered by the unfulfilling nature of their relationship with a nagging, insulting, belittling, cruel, loveless woman who wanted a white man for control, social acceptance, and assimilation – lash out in the only way they can – against Asian men.
As it stands, society in general really, really genuinely hates Asian men in any kind of romantic light, despite being perfectly fine with Asian women; and so this will have, and has had a tremendous psychological effect on the children.
Ironically, this means many half-Asians inherit their fathers’ racism and desperation and entitlement, plus their mothers’ self hatred, plus their father’s latent dislike of Asian men. All while being “cursed” with being partially Asian and LOOKING ASIAN – a universal negative on a man in our ruthless, hateful cultre – and two parents who both wish that the woman and child were white. Ironically, many of these parents, intent on bringing back a “golden age” of the west, one in which white men were supreme, white women kept in their places, and men of color removed or rendered invisible – are unable to piece together the fact that in any white supremacist system of power, our non-white blood would become a symbol of abnormalcy, which is exactly how Elliot Rodger internalized his Asian blood, as inferior and abnormal against the white hegemony his mother and father worked so tirelessly to uphold – all without the help of white women.