In Mafia 3 you play as a black Vietnam veteran in 1968 Louisiana, and there's a level where you get to crash a rally for white supremacists. You can go in guns blazing, but the game does offer stealth gameplay and whenever that's an option that's usually what I'll go for.
Anyway, you can get yourself behind and then above the stage where the grand wizard is speaking from. During the whole mission he's preaching this truly vile stuff trying to incite a race war. At the crescendo of the speech, he says something like "We're going to go into [black neighbourhood] and BURN THEM ALL" - and I always thought that was the perfect time to drop a molotov on his head before chucking grenades into the crowd.
Aside - it's painfully obvious that this supremacist group in the game is the KKK, but in universe they give them a fictional name. I'm sure this is one of those things where the developers include a note saying "any resemblances to real people living or dead is a coincidence" but fuck that noise. It weakens the societal critique of a game that presents itself as historical fiction, and also I don't care if you hurt the KKK's feelings by making a game where you murder them. Frankly they don't deserve to breathe the same oxygen as the rest of us.