Nina Einstein is by the end of the R2 not at all Racist anymore. Which is not unique to her, the show is filled with Britannian characters who are being quite racist to the Japanese early in the show and aren’t at all anymore by the end. None of them have a particular moment where they repent of their past racism and denounce it, it simply becomes apparent that they clearly aren’t racist anymore.
Her primary sin is creating and then at first consenting to use of the Fleija. But she’s far from the only person complicit in that, we’re introduced to the plotline via Lyod learning about it and encouraging her. But more so it is Sechenizal's manipulation of her that really drives that plotline.
But let’s return to the topic of racism. Why is it in a show filled with people who are racist at the start and not by the end is it Nina alone whose early racism is treated as a defining character trait and an unforgivable sin?
Racism seems to have been a more passive character trait in a lot of other characters. But they are also people in real positions of power. It is how casual they are about it that in my opinion makes it worse. Characters like season 1 Cornelia and Jeremiah whose use of Racist rhetoric is more a means to an end in their political power playing are not materially speaking less racist because of that, they’re Herman Goring.
Nina at the start of the show is a teenage girl with severe social anxiety in a highly systemically racist society, and also a repressed Homosexual in a pretty systemically homophobic society. She didn’t choose to be living in a colony rather than the homeland, that was her parents decision. By the time she actually does anything significant in the plot her Racism is no longer a primary motivating factor in her actions but at most a filter in how she’s directing them. Finding out Zero isn’t Japanese wouldn’t make her not want to kill him anymore.
I’ve seen people say they wish there was more of an explanation for why Nina is this way, a specific thing to happen to her to cause it. But I feel that misses the point of viewing Racism as a systemic issue. Nina is Racist for the same reason everyone else is, but innate issues with who she is as a person makes it harder both for to change when presented evidence contradicting that world view, and to hide it.
There are a number of YouTube videos I started watching but didn’t finish because they open with a rant about “most” Gay Representation in Anime isn’t great. Such sentiments annoy me since I feel exactly the opposite. One uses footage of Nina among its visual B roll for this which I found interesting. With Nina it is definitely backwards, to me Homophobia and Misgyny is clearly why she is such an irrationally hated character.
This is not about making excuses for anything, it’s about having coherent standards in how we judge people. If some former Racists can be forgiven for their past Racism while others can't, that's fine. But Nina’s circumstances should clearly make her the easiest to forgive not the most unforgivable.