Allah was the pagan Arab moon God, hence the crescent moon symbology found throughout Islam. This was the predominant Pagan religion of the ancient Middle East. In Babylon, Bel; in Sumer, Sin; in Arabia, Allah;...etc. This is well documented by both archeology and historical documentation. It is strongly disputed by Muslims.
I once contemplated starting a web-site Good muslim. com, as in, “the only good muslim is a dead muslim”.
Figured it would not do any good so I demurred, for now at least.