Will the real God please stand up?

Lots of people believe in God and that's great. But more people believe in other higher powers like Budha. Who is to say that one is real and the other is a false God. With no tangible proof that either exists, why do so many people swear that God is real. Is Budha real? Do you God worshippers believe that all those that worship Budha or some other God are all wrong and will go to hell? Just curious..