On analysis the old testament God served as the template for the Islamic God, and everything else that constitutes the Muslim faith.
Both of their Gods condone all manner of illogic and hate for much of their creation. Both seem inordinately interested in earthly wealth and riches for their followers and a life of misery for their enemies. When these gods use the same methods and goals as their resoective religions Satans do. There is little functional difference between the extremes of their morality from their God to their Devil.