Something that chronologically predates the concept of Allah? What?? I'm not intending to argue on either side of this argument, but this logic is faulty. something may have come prior to the revelations to Muhammad (peace and blessings of Allah be upon him), or prior to Abraham's life (peace be upon him), etc., but that doesn't mean that the concept of ONE GOD was nonexistent! if the ones to whom you refer did not know of the belief in ONE GOD, it does not negate the existence of that belief. They just did not recieve the message, they were perhaps unaware of the belief.

Again, i'm not trying to argue specifics about the topic, but rather about the statement of predating Allah.