I think his deal is he needs to feel important. So he found a scripture that he applied to himself and then started preaching what he believed. I think that he expects too much from prophecy - I mean, he just wants to show off how smart he is and how he can "interpret" prophecy.
So he maintains the platform of moral righteousness by claiming to be a great JW, but he is sharp, harsh, condemning, unforgiving - I had a few email exchanges with him that revealed him to be a very pharaisaical and Old Testament kind of guy.
Plus, he refuses to identify himself, which must drive the Borgmasters crazy. If he ever slipped up and revealed his identity, he'd be out on his ear and he knows it.
I think he is motivated by a certain concern for his brothers, and thinks he is doing them a favor by confronting "apostate" dogma.
So he wants to think for himself, and he wants to think for you too.
CZAR