I liked his books until I met him at a 2002 book signing and found him to be an ugly, pompous jerk. That he turns out to be the exact type of loud-mouthed, secular Jewish collectivist that has done so much damage to American art and literature over the past several decades comes as no surprise.
It is like Turtrledive resents conservatives because they make up most of his audience and he just targeted them to make money not because he cares about history.