Maybe I'm naive but I'm always surprised that intelligent folks like you, aj, LG, and others give this troll exactly what he wants, which is attention. He's not interested in any kind of reasoning unless it leads to more attention, and he doesn't care about the quality of that attention or what you think of him.
Responding to him (or any troll, for that matter) just increases the noise level on a board - if you look at the last 30 or 40 messages on this board I'll bet you'll find a high percentage devoted to responses to his posts.
Trying to convince him to be a nice guy is not the solution - the only real solution is to IGNORE him and NOT respond to any of his posts.
OK, off my soapbox now and back to the regularly scheduled markets.