There is no, "General" proof for anyone who disbelieves in God.
Everyone has their own set of what God could do to make them believe.
I am agnostic-Theist..Before I was Agnostic, but more skeptical..That was before I was thrown through a windshield and out on the street in a car accident when I didn't have my seatbelt on..And lived through it.
So believing without question in wild, crazy, unproven and unprovABLE fairy tales, just because some old money-grubbing death-dealer in a robe tells you to, is reasonable?