The main guideline is always this: discuss the issues all you want, but do not make it personal.
Do not use the word "damnable" as it encourages potty language.
Some English versions of the Bible use the term, "damnable heresies", and that was the idea I had when asking about the word. Certainly not in the vein of employing vulgarity or promoting vulgarity, but in the context of heresies being false beliefs that damn the soul to hell, which is the context used by the Apostles and early church.
Since it is objectionable, and personally I think is a tad PC, I do understand how on the internet it could be easily misunderstood, and will gladly use another term that cannot be misconstrued.
The other words are tolerable in religious debate providing the delivery is not hateful.
Thanks.
The main guideline is always this: discuss the issues all you want, but do not make it personal.
Which is always my goal, however, my experience of years on the net on boards like this one, shows me that no matter how much one strives to accomplish that goal, there are those who take things personally when nothing personal is said or intended and then take things to a personal level themselves.