I watched a programme I had recorded last night, about fundamentalist Christian groups attempting to influence UK government over various issues, one being the building of a mosque in London. Apart from the way they were praying - telling god what he would presumably already know, and issuing what seemed very like instructions about his preventing this building, there were some disturbing insights into how at least one of them saw Allah.
Logically, there are a number of possibilities. If there is one God, then he who is called God by Germanic speaking peoples, Dieu or similar in Latin derived languages, and Allah by Palestinian Christians and Muslims must be one and the same, since there is no other. If there are more than one, then either one, or another, may be right, and others wrong, or all of them are wrong. If there are none, then the question about their being the same or different is irrelevant.
The leader of the praying group had an alternative. There are two very powerful beings, one good and one evil. Since he who is called God by this sort of Christian cannot be the same as he who is called Allah, then Allah must be the other one. Whom he named.
Since this second being in whom I have no belief is bent on evil, it seems very odd that he inspires so many Muslims to lead quiet, contemplative and good lives. Presumably as a smokescreen to hide the few violent ones. Which raises the question of why the other, good deity, allows so many violent followers among his flock.
I think the folk interpretation of the nature of Old Harry, Nick and his other cognomens is much more healthy than the extreme religious view.