I mean, leftists don’t support and enable genocides, so Democrats can’t be leftists. Which side was which in World War 2?

Dude were not doing the which side debate either. Dems aren't the biggest monsters, but they're not leftists. One side is waving rainbow flags while bombing children. The other is waving confederate flags and swastikas while bombing children. WW2 was before the party switch, not the best example.