I don’t mind a bit of cussing and sarcasm as long as you argue your points as opposed to just baselessly insisting that I failed to prove my point.  Unfortunately, the world of Christian fundamentalism consistently produces no end of extremists that eagerly mistake “preaching to the choir” with “honest dialogue”, and I therefore slice and dice as I see fit.  You have nothing to worry about if you know your subject matter and can discuss it in mature fashion.