“So the Muslim morality, which is based on belief in the same god as Judeo-Christian morality, is justified?”
Well not to be harsh but I can see that you know precious little about the subject. Islam isn’t based on the Judeo-Christian God or its morality. Islam borrows names from the Bible but that’s all.
I beg to differ. Islam is based on the same “God of Abraham” as Judaism and Christianity.