Quite a lot do, I think. From a muslim point of view it's a reasonable perspective.
That's what it's all about, really. At the end of the day anybody seeking spiritual fulfillment has to be looking for the same thing, that same 'source'. There are just many interpretations of what it may be, and I think most of us would agree that whatever it is it something that can only ever be experienced rather than explained using language. And there are, I think, just as many ways to get there.
That's why I think religious tolerance, choice and freedom are so important. Practicising Christians, Jews, muslims, Buddhists are all good people, or at least that is what they strive to be. The more pious and devout they are, generally the better people they are. If there is a Paradise, in whatever form it may be, I simply cannot believe that all such people will not, in time, enter it regardless of whether or not they accept any particular concept of what that source, or God may be. That's probably my biggest problem with Islam, BTW, I just can't concieve of a God who would not arrange things like that simply because He was 'denied'. It just makes no sense to me.