I agree that it doesn't matter, but where did you get the idea that these guys are/were Protestants (or even Anglo-Saxon for that matter)? Posner and Bugliosi were raised Catholic and Specter was a Jew.
edit: I guess that was your point.
Yes, that was my point. But I wonder if Michael will ever get the point. There is no strong correlation between what ethnic group one belongs to and what they believe about the JFK assassination and other subjects. But that does not seem to be his world view.