If they always asked themselves...would we allow this same image if it was a Muslim depiction? And if the answer is no, then they should not go with it. End of story. That seems like a very simple litmus test to me.
The problem is, they hate Christianity and love Islam. Not that they love Islam as a religion, but they love it as a tool for attacking Christianity, Christian civilization, capitalism, individual freedom and liberty. That’s what they really hate. Individual freedom and liberty. And Christianity was the birthplace of both Western Civilization and the concepts of Individual Freedom and Liberty. So they really, really, really hate Christianity.
Islam? Heck, that’s just a bunch of fanatics out to kill Christians and those ... what did Hitler call them? ... oh yeah, vermin Jews.
So they LOVE Islam.