And no wonder, for Satan himself masquerades as an angel of light. It is not surprising, then, if his servants masquerade as servants of righteousness. Their end will correspond to their actions. (2 Cor. 11:14-15)
So who did Mohammad meet in the cave?
Mo met the same demon who told him, “I offered that fellow Jesus the entire world if He would but worship me and He refused. So I’m making you the same offer. What say you?”