They could argue their point and were not attacking anyone specific. The mod continued to be upset and eventually attacked the poster specifically, when the posted stayed hypothetical.
If you don’t know how dismissive of atheists that saying is, how it’s used to shut down their opinion, which they were sharing without attacking someonee specifically, likely because they became atheists after a lot of personal work, is exactly why atheists get shut out of a conversation.
Is their opinion not valid? Have they attacked anyone or taken any rights, or just expressed an opinion they offered to discuss and never attcked anyone?
Literally they pointed out the flaws in the mods argument and the mod got mad. Only one group was being aggressive, one group made a mildly flippant joke and was willing to discuss the nuance. One became sarcastic and rude.