But I have to go back to an important issue: the premise that underlies what you are saying is that beliefs really do not matter. In other words, it does not matter whether a person prays to Allah, believes in Jesus, worships a Hindu god, etc.
I have to respectfully disagree. This makes all the difference in the world and you can see it by the countries and regions around the world. Hinduism has created much of what you see in India (not everything of course) and that is drastically different than Islam which has created what you see in Saudi Arabia (not everything of course), etc. etc.
What you pray to and what you think about God does, imo, matter hugely. It cannot help but color all you do and also establishes the spirtual powers behind your prayers.