If only one religion is right, then the God of that religion is either evil or an asshole or not all knowing and all powerful.

If you think about it, and all knowing all powerful God that allows a gigantic portion of his beloved children to live in complete and total ignorance for their entire lives without even the chance of ever knowing the truth would be a terrible asshole at best, and that's only assuming that he doesn't throw everyone that doesn't get the truth he didn't give them into hell forever.

Of course that only covers the abrahamic religions. I feel like Zoroastrianism would probably still be okay because as little of it as I understand it seems to be more like the world is a stage where a chess game is being played and each piece moves as it will and the battling deities over watching the game can only make so many moves each to keep it fair.

Buddhism can't really complain about it other than that it sucks that we're all currently stuck in hell and having to live tens of thousands of lives until we're allowed to get out, seems like more people should make it out as time goes by.

Either way though, if there is one true religion it would be amazing if the god of that religion would occasionally pop onto the planet and remind everybody that they exist, maybe give us the bread and circuses show to catch us back up, maybe throw out a couple of worldwide hey I forgive everybody's and then pop back off just to remind us.

A thousand years without a reappearance of the God of all gods is a long time to keep the torch burning.