Once again, it's very easy to suggest that everyone be calm and nice when you have not been the target of the crazy person's rantings.
RG isn't just a different personality that's rubbing a few of us the wrong way, in my opinion. I don't give a damn how long his posts go on, and his bloviating nonsense is only mildly irritating. The truly offensive behavior is when he attacks based on a mis-reading of a few phrases in a post you've made. He's a guy who isn't interested in what anyone has to say, only what he has to say. He's not a contributor in any meaningful way.
I dare you to find a single instance of a case where he has clearly read a post of more than a couple of lines in length, and made a cogent response to the central remarks made in that post. You won't find one. He writes at length, but won't read much of anything, and becomes wildly angry when he perceives he is being attacked, which he does quite a lot of the time quite independently of whether he's being attacked.
If you like his critiques, and find them helpful, well, that's great. Just don't try to engage him in conversation, it won't go anywhere and it'll probably blow up. You may not care, but me, I like the possibility for conversation and debate that a forum offers.