I dunno about the others, but the icon for the Rust discord is the Rust logo superimposed on the pride flag, so they are not subtle about their position on the topic, and it has therefore been a topic of discussion in that community.

The reality in online space is, you can either make Nazis aware they're not welcome at the door, or you can let them know when they start making trouble. Either way, if you wnt to keep your online community copasetic, eventually you have to tell Nazis to fuck off.