” He can only argue for what he believes – or ask questions.”
Arguing for what one believes is very good. Too many arguments are not so much what one believes but why one doesn’t believe tenets from another’s faith.
How is asking questions to be moderated? There are certainly loaded questions that would lead to flame wars, i.e., “why don’t you think you are a devil worshipping idolater whose leader is probably the Anti-Christ?”
Loading questions in an ecumenic thread is a disruption and the poster will be booted and/or suspended.
LOL. Well, we'll have to have various sub-sets of questions and we'll have to decide which questions are respectful and which are not.
Good luck with that???