There is a rigidity to some people and their views, we've all experienced that. And I think because
we've all experienced that, there are also those who also enter into any discussion on certain topics (religion, politics, etc) more or less in an offensive position, as in the best defense is a good offense kind of thing. Giving them the benefit of the doubt, maybe they don't realize they're doing that but a lot of times they are. It's kind of the antithesis of 'discussion' to do so, in my opinion. Conversely, I've also seen a fair number of members, past and present, that seem to be
of the notion that any religious discussion should be limited to the ability to talk back and forth with like minded individuals or that one of the sub-forums of a sub-forum on a general discussion forum is the right place to preach for some kind of conversion.
I guess the bottom line is, people may often think they're discussing something but their lack of interest, willingness or perhaps ability to listen
just makes for a lot of one sided speeches.