Case in point: Yahweh proved Himself at the Red Sea and weeks later the King's kids were worshipping a golden calf.
Indeed.
Something tells me God stopped trying to prove things to "ungrateful" people a long time ago.
I mean, when He proved via miracles, it didn't matter and when He proved Via His Son and His miracles, they killed his son.
I mean, I may not be omnicient like God but something tells me He may have gotten the message last time around.