I just find your question irrelevant. There's a variety of potential factors to account for immoral - whatever that means under materialism - acts throughout human history.
What I thought we were discussing was the potential for a paradigm to create a utopia or dystopia.
As I see it, there are two forms of utopianism, this-worldly and other-worldly. This-worldly utopians think they can make this world a perfect or at least much better place. Other-worldly utopians think there is another world, usually an afterlife, that's perfect or at least much better than this one. According to these definitions, I would say that Alex is a this-worldly utopian and Jeff Long is an other-wordly utopian.
For this-worldy utopians, history is extremely important. Such people think they know why there's been so much violence and injustice throughout history, and it's ususally just one thing. It's capitalism, the state, religion, human nature, philosophical materialism, atheism, satanism, liberalism, or whatever. If we can get rid of or change this thing, then we can solve all our problems and make the world a much better place.
My main critique of this-worldy utopianism is historical. That is, I think they've got the history wrong. If the history were correct, then their utopianism would be perfectly understandable and I might agree with them. If we had strong historical evidence showing that people or societies that believed in the afterlife and/or psi phenomena had no violence, greed or selfishness then that really would be food for thought. As it stands, though, we don't have this, and so Alex's idea that belief in the afterlife and psi will make the world a much better place just seems silly.