Normally, I would agree absolutely. In this case, that will not work for me. This isn't a matter of some NPC I can just ignore or rewrite, or some rule I don't like... this is a matter of a demon from an active real-world mythology being assigned divine status. The notion makes me uncomfortable about the idea of picking up and using the 4e rules.
Please note that I am not some fundamentalist reactionary. I've never subscribed to the notion that D&D is somehow evil, or similar. And I was entirely comfortable with Asmodeus and the rest appearing in the game... provided they remained listed as Demons (or Devils, or Arch-devils, or whatever). That was all fine, just as long as they weren't gods. Change that as the default assumption and I have a very real problem.