It seems some directors will go to insane lengths to avoid using CGI, seemingly just so they can point at the screen during the premiere and say 'yeah, a real guy totally did that.'
There are all sorts of random factors in your environment and biology that bring out your inner asshole. And sure enough, the science suggests that all manner of strange things trigger racist behavior.
You industrious types who take great joy in doing difficult tasks -- go clean your gutters. For the rest of our lazy brethren who are still reading this, probably from bed, we're here to tell you that the future is bright.
We're not saying that willpower and mental fortitude don't play a role. We're just saying that even if your mind is in the right place, the deck is still stacked against you in a bunch of different ways.