I’ll give you a different scenario.
On your morning walk you come across a little girl with a brown and black shepherd-border collie cross. The male dog walks at the girl’s heel, is docile, friendly and under her complete control. You pet the dog who licks your hand and rolls over to show its belly. You ask the little girl her dog’s name and she says his name is Yesh.
A little later in the morning you see what appears to be the same dog but this time on a leash held by a young lady. She is obviously having serious difficulty controlling the dog. The dog growls and barks at everyone who passes by. As you draw near in your attempt to see if the dog is actually the same as the one you saw earlier in the morning, the dog starts to snarl and the lady says “I wouldn’t come any closer if I were you!” You ask the dog’s name and she says his name is Al.
The two animals, both known as “dogs” look identical. The first was called Yesh by the little girl walking him, the second was called Al. Could they be the same dog? Perhaps. Could they, on the basis of how the dogs behave, be two different dogs even though they superficially appear to be the same? Is it legitimate to ask if the two dogs are the same dog or different dogs? I don’t see why not. I don’t understand why anyone would say I am foolish or naive or worse just for wondering, based upon how the two dogs behave, if the dogs are actually the same dog.
I thought the question at hand was whether Muslims and Christians worship the same God. There are some things the two Gods appear to have in common – omniscience, omnipotence, immateriality, eternality, etc. These traits could have been arrived at independently by purely natural philosophical thought, as was pointed out earlier in this thread. This would be akin to what you notice about the two dogs - same coloration, both male, both same breed, etc. You, and anyone else, could arrive at those descriptives by purely “natural” and from-a-distance observation without personally encountering either dog. Once you encounter each dog, they “reveal” themselves to you, akin to what the two Gods ostensibly reveal about themselves to each group of believers – Muslim and Christian.
Now after the two dogs reveal themselves to you – Yesh, in the morning, friendly and behaved; Al, later in the morning, aggressive and dangerous – you could legitimately wonder if they are different.
Despite both being dogs of the same breed and looking identical, you would have grave doubts that the two dogs are actually the same dog. Or, maybe you don’t, I don’t know. I do know, however, that I would doubt they are the same dog and have good reasons for thinking they are not.
Based solely upon what the two religions reveal about their God (not their dog,) I have grave doubts that the same God is being referred to by both religions, just as I would have grave doubts that the two dogs are the same dog despite some similarities.
Now you can keep asking two different questions and insist that they mean two different things, but those two questions have little relevance to the question at hand.