Gee Greg I wonder who should I think would have more credibility

You missed the point entirely, Boo, or, more likely, you're simply ignoring it. Try re-reading 10 May 14 - 01:25 PM

when it comes to knowledge of matters Islam

We're not discussing "matters Islam", Boo - we're discussing extremists.
Not that would stop you tarring all Muslims with your usual Islamaphobic brush.