McGrath, in your posting about Allah and God you're are confusing the issue by using the wordGod in two different senses in consecutive sentences. yes, they are all the same God (in the sense of an omnipotent being, a deity or whatever). But "God" is also the name of that God as used by Christians. ie "Allah" and "God" are both names of the same God. And as other posters have pointed out, it is only common politeness to use whichever term is appropriate for the people you are talking about. It's also worth pointing out that the essential oneness of the three deities of these three religions may be familiar to educated adherents, but it is by no means so well known to the more rank-and-file adherents.