Free speech is speech that is protected from government regulation or persecution. This is a private platform, and therefore Nazis and their speech can fuck right off.
So yeah, they are absolutely to spew their hateful speech without legal repercussions, but we absolutely do not have to let them do so here.
Absolutely no memes please. Right now, r/games is easily the subreddit that I miss the most, and it's because it was entirely news and discussion focused. I sincerely hope I can turn to this community for most of my gaming news, and don't want to see an influx of memes.