I just had a look at his profile, and wow, I wouldn't call him "super right-wing." I'd call him a loonie. Fortunately most of the magazines he's squatting on have similarly loonie names and I doubt there'll be much call to use them for anything productive. Maybe Graphene and Fluoride might be useful for serious posts someday, but they're pretty special-interest for the size of the Fediverse right now.
Personally, I have a pretty low bar for blocking other users here. If I find someone consistently annoying or negativistic I'm better off not seeing their posts, even if they're not actively trolling. It's not a public punishment or anything, they won't be affected at all, and I get to spend less time reading content that doesn't interest me.
There really does need to be a limit of how many magazines you're allowed to moderate. There's no way you can effectively moderate 59 different communities.