In fairness to him, he does respond to comments questioning him. Sometimes that happens a week or two later (I’ve even seen longer – he isn’t around all that much in the first place ), but he doesn’t shirk when challanged. And he has insisted he means what he says, when challanged on his sincerity.
I think it is also worth pointing out, although some here doubt him, so far I saw Mod 80, WIY, BP Totty, Jose, ICOT, mw13, sof davar, and myself find him sincere even if we might disagree with him sometimes or even often.