According to the faith that GWB professes, there is only one God and that this Almighty God spoke originally to the jews, bringing His law to them. He then came in the person of Jesus to bring salvation to the jews first, then the gentiles. He requires exclusive worship and denies the existence of other gods. Worship of other gods, or the supposition of the existence of other gods is blasphemy and those that did so, records the bible, earned the severest punishments.
If this Almighty God speaks to the people of other religions it is to inform them that they need to repent of their false religions and false gods.
And if you think that the Christian's God and Allah are one in the same, then you are, without a doubt, blind to what they both teach.
As I stated in another post the concept that God has had an influence in other religions is nothing new.
I agree that it is nothing new, but it definately is not in accordance with the God of the bible.
Christianity might (I would disagree) be a load of crap, but at the least, lets have some intellectual honesty with regards to what the bible teaches.
The difference between these two is that in the first case there is no justification for the political equality of another religion from a theological point of view. Where as in the latter's case because they are only a corruption, or an example of incompleteness theologically, there is some validity to treating them politically equal.