It's not that persons fault at all, but I think you're making a mistake here in making a systemic question into an individual. We can recognize that no person is inherently "evil" (though I hate to use that word, I'm just lacking for words), but also recognize that the person is a member of an ideological group that is, and as long as the person is a member of said group, they're opposed due to the fact that they are working towards genociding minorities.