Rare instance of Twitch actually doing their job as expected instead of arbitrarily – do not expect it to be a standard.

Entirely justified. Fuck off with this "muh systems of power!" "muh institutions!" "muh punching up!". Attacking/using derogatory terms on a person based on their race, ethnicity, religion, culture, etc is, by definition, a slur. That doesn't mean "it's as bad as the n word" or that a slur (for some reason) needs to pass through "the n word scale" before it can be deemed as "bad enough". If you wanna say slurs, fine, but you can't play this wishywashy game of "I can mock you, but I'm exempt!" Either everything goes, or none of it does.

"Oh, but whites have social power! it's not the same."

Nevermind the fact that has nothing to do with the basis of slurs/insults, but "whites" aren't a collective hivemind. Some dirt poor crack baby in a flyover state trailer park isn't the same as a trust fund kid that's never left their gated community just cause they're both "white".