B/X Known World
I run and play a lot of Call of Cthulhu. I stick the racism in the trash where it belongs. If players want to play racist characters they can find a new table. The worst they’ll deal with is side eye and a tsk-tsk now and then. Historical accuracy be damned. People that deal with this stuff in real life don’t want to RP that same crap “for fun”. It’s not fun. Just don’t. You don’t have to include racism and sexism and other phobias and hatreds in your games. It’s a choice to do so. And a really terrible choice at that.