Maybe him maybe not him doesn't really matter. The problem is he doesn't really respond to any questions or carry on a discussion. He seems to just really stick to talking points and hammer on them without really listening to the other side.
He may have already had a few bikelocks to the head as you put it, he is just downright confrontational, constantly on the attack. But whatever not breaking any real rules or anything so he can have at it.
But if you are replying to him I wouldn't expect a good faith discussion. Fair warning.