This situation is easy to handle. Don't give the fascists a forum.
I'm not giving them one, whether they really are fascist or not. I the case of Gumbercules, I haven't released his profile and I only let comments through when I believe they don't go over the edge. At some point, he either starts behaving instead of provoking, or he gets tired of having to wait for his comments to get released. The latter seems to be happening, though one can never be sure. If he goes overboard, he'll be banned and I have perfect arguments for doing so, that are hard for him to argue with.
I don't have a lot of time right now, due to personal circumstances, so don't go nuts if I don't moderate perfectly or instantly. Give it some time. In the end, only the Cryosphere threads are worth following and engaging in. The rest is pretty much irrelevant, and depend entirely on what you can get out of them for yourself.
This is all normal, in my view, and not worth getting upset about. Go out into your garden, and if you don't have one, get one, create one.