*After finishing thread to this point goes back to reread the OP*
@Trailblazer ... In response to the OP I do recognize that you have flat out said this is not targeted at atheists on RF. So far, so good. Whew, that was close.
Please note that this 'strong' atheist agrees. No one should be treated in a demeaning manner unless
all other avenues of communication have had no impact and the other party will not just shut up. Then, frankly, it's open season. Prior to getting them getting snarky, it is probably best to smile and walk yourself away.
We try. We are not always successful due to the flimsy arguments unleashed by some believers but there is usually an underlying modicum of respect in play.
We should always endeavor to "do others as we would like to be done". If one is a relentless jerk it should be assumed that is how they want to be treated. The greatest balm against mean people is to treat them with effusive kindness and a sense of humor. They are trying (and succeeding) to get a rise out of you. That is why they do it. Deflect the comment and they will get looped into, "Wait, what? She didn't get all upset. This isn't fun."
The nutcase in my brain is gonna give you a freebie.... hang tight!
The next time this happens, suddenly look somewhere behind them, point and enthusiastically exclaim (in your best 7 year old girl's voice), "OH! Look! A bunny!" .... and walk away chuckling.