Dear racists

Ever since that webtoon ' song of the wasteland ' came out and jaxx got criticized for it, I've been seeing an uproar of racists on both twitter and this site. I personally have never met a racist in real life (due to my location), but thanks to y'all I've met a lot of them online. So I'm wondering, what goes through y'all's brains? Like what makes you hate a person so much for being more melanated? I'm genuinely confused.