The greatest Nazi-killer of the 20th century was Josef Stalin. He also killed millions of his own people and terrorized, oppressed, enslaved or brutalized tens of millions more.
The fact that he killed Nazis during World War II (out of self-preservation, not principle) doesn’t dilute his evil one bit.
It’s fine to believe that Nazism was more evil than communism. That doesn’t make communism good.
And that’s why this debate is so toxically stupid. Fine, antifa isn’t as bad as the KKK. Who cares? Since when is being less bad than the Klan a major moral accomplishment?