There used to be one, but it was shut down and in general the Lemmy community has (had?) a good immune system against letting these people get a foot-hold.
Well, I had to see a ukrainians-are-nazis meme on my timeline and that's not something I can just ignore. If I can't find a way to get rid of that type of vomit I can't continue using this platform. Remaining neutral always favors the oppressor.
I'm always wary of those who wish to censor others. To me, defederating from lemmygrad is the same as defederating from lemmy.world. you're closing yourself off from other points of view and discussions with others.
Though I much prefer the fediverse view of "block/remove it from your own feed but they can still post as they please" than traditional social media's "ban them off the entire platform for disagreeing".
Not the main one, that used to be wolfballs but it dissapeared from the net a short while ago. maybe it will come back, but it is still widely blocked.
exploding-heads is more of a right leaning shitposting site.
Ygdrassil is probably the worst I've seen so far when it comes to far-right idiots, but don't actually recommend you to check it out. The rules section alone is enough to make you vomit