The whole idea of parallel universes is christian/jewish bullshit. "Don't worry how bad your life is as my slave you worthless goy, there is a parallel universe where you are in heaven right now!"
They use it to control people the same way they use the idea of heaven to control people. "Don't worry how horrible your life is during dark-ages and communism, this lifetime is not important. Because you will be in heaven soon. Don't worry what we do to the world, and don't worry what we do to society, because you aren't going to be here, you'll be in heaven."