Cronos, you have nothing to apologize for in this matter. Certainly not as far as I am concerned. I look forward to further conversations with you.
The problem to which you refer, however, is another matter. It is either a case of true ignorance or lack of self-control. In either case it would be pointless to continue conversation.
For this, I can't comment on reasons but just as many Baptists and I'm sure Lutherans have had ingrained ideas about Catholics that are not true, so too would Catholics and Orthodox have -- it's one of the vagaries of human nature that we believe the worst about others.
Luther was no fool -- in fact I'd argue that he was very well studied. We would of course debate the steps he took but we can agree on his scholarly nature.