The problem is this doesn't apply equally to all mythologies that could have followers. For example, we wouldn't be having this discussion if the point was made about Pagan traditions or about Zoroastrianism, say, since those followers don't hold primacy in the culture.
Looking at the moderated post, I very much doubt action would have been taken if the subject was a very minor religion.
Also, if somebody makes a Christian based RPG setting, that's what opened the can of worms. It's subject to the same discourse, ribbing etc that all other settings are. The OP here is not the one who decided to make a for-profit D&D setting based on a religious text (nor would he be far from the first to do so). You can't open the door, and then complain when people walk through it.