The Next Voice You Hear

The other day I came across a reference to a movie I hadn't seen or thought of since I was a teenager. It was "The Next Voice You Hear" (1950) where god decides to speak to the contemporary world. It occurred to me that if god actually exists why doesn't he/she/it reveal him/her/itself to us like in that movie and show us who really got the story straight and is worshiping god correctly. Think how much pain and suffering this would put an end to...and we atheists would have to acknowledge that god exists.

The only reasons I could think of was:
1) He/she/it is a sadist who likes to watch us suffer as we hurt and kill each other fighting over which god is the true one and who is worshiping he/she/it in the right manner. If true such a deity is not deserving of worship.

2) Honoring my father, who loved  Erich von Däniken's "Chariots of the Gods", it could be that those ancient gods were aliens who know if they reveal themselves we would now comprehend the old gods were advanced aliens and not the deities they pretended to be.

3) The god/s the believers, who cling to these old mythologies, are fighting over all around the world doesn't exist because if he/she/it is omnipotent and omniscient as claimed there is nothing that can be stopping him/her/it from showing us his/her/its divine existence. Why then do so many still adhere to this nonsense?