You cant prove there isnt a God

[Angrboda]

As a Hindu, I can tell you in no uncertain terms that what I worship is not the same thing as what Christians and Muslims worship. Your attempt to equivocate from a specific thing that is god to anything vaguely godlike, including the universe, fails. That would be like saying all tables are basically chairs because both have legs. So, no, half the world does not worship a specific god thing, half the world worships different godlike things that share some, but not all, of their properties. Saying they do, and therefore they all worship "God", is equivocation and invalid as a matter of logic.

Further, God spelled with a capital 'G' is, by convention, reserved for referring in English to the god of the Christians and the Jews and several other offshoots of Judaism (the Samaritans, for example); it does not refer to a specific but religiously neutral "god" any more than the name Kali refers to a notion of the Shakti as the embodiment of the divine feminine irrespective of the specific tradition of specific Shakta Hindu belief, as different traditions envision the nature of the Shakti very differently. So not only is your logic wrong, you're not even using the right names to make your argument make sense. Following tradition, what you've stated is that half the world follows "God," being the god of Jews and Christians, and that statement is just absurdly wrong. I can tell you for a fact that while I do worship a god, I most certainly do not worship "God."