Do you think those are the only comments on Lemmy advocating for violence? There are also plenty that don't get removed.
Just go ahead and say that someone advocating for violence against political opponents doesn't bother you. That's fine if you to think that. We don't have to agree on whether that's a bad thing or not. But don't pretend it's not on Lemmy.
There have been some recent threads about people actually quitting Lemmy because of violence-spouting trolls and extremists. KYS comments are pretty common too.