Imagine the secular paradise? That really worries me!

I'm perfectly willing to see this is as a pretty idealistic song. But if someone is serious about trying to bring it to pass, then I get worried. I can understand someone being an atheist, believe me. What I find insane and dangerous is the idea that somehow the departure from religious belief will lead to some sort of secular paradise. With a religious paradise, it takes God to bring it into being. With a secular paradise we can, and are supposed to do it ourselves. If you take a vision of the secular paradise, and then you accept a combination of "everything is permitted" and "the end justifies the means," and you have a formula for bloodshed that will permit you to outstrip the body count of all the religious killings in the history of the human race.