No one here, as far as I've seen, has ever said you can't swear or offend people. As you said, it is nearly impossible to avoid offending someone in a religious debate, especially when one side believes you will burn in an eternal fire for not being one of them. What I hear from you, however, are poorly reasoned excuses to stoop to their level while attempting to hold onto the idea that you are merely trying to change their mind. You can call people assholes all you want, but as it has been pointed out here multiple times, if your goal is to change another's mind, calling them 'stupid fuckheads' isn't exactly going to be productive.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell
