BEE...you stated:-
On another thread, another Christian tells me the only proper and useful way to argue with a Christian is to understand and use their theology, one's own logic and reason is not enough. AFAICS, there's no satisfying Christians - they appear to have 'damned if you do, damned if you don't' down to a science.

Attempting to play one so called Christians views off against another is as simplistic as attempting to play one person off against another.
Could you please give me a reference for the other thread as I cannot believe a true Christian would suggest arguing with a Christian....