I haven't listened the interview yet, but I always find this an interesting topic. Luckily, I don't have bad experiences with religious zealots.

Personally, I think that the live and let live mentality is best applied here (as Leiter suggests if I read the summary correctly). Religion does give some people strength to do more with their lives and there is no reason to take that away from them. One cannot prove the existence of God, nor prove the he does not exist. And because of that, we can't go around and say that religion is wrong.

There is only one problem with letting religion going unchecked. One of the reasons religion is so successful is because the idea inherently wants to multiply. Let me explain: Ideas multiply and survive because the ones who have the idea shares the idea. An Idea which actually encourages the spreading of the Idea has a higher probability of survival in the jungle which is our collective mind. But think about the Idea itself for a moment. The idea doesn't have to be a good idea. So, bad ideas with a good survival potential is more likely to survive then a good idea with a bad survival potential. I will not judge whether religion is good or bad, just keep in mind that the idea can be good, bad or anything in between.

I said that there was a problem with letting religion going unchecked. The problem is that the Idea religion is an Idea with a high survival potential. This means that even if we were to forbid religion, it would most likely still survive. On the other hand, if we leave it unchecked, we will see people trying to convince others that their religion is true. This will result in things like Jehovah's witlessness, who are disliked by everybody and just completely insane cults like the Peoples Temple, which resulted in the Jonestown mass suicide, and the Church of Scientology. On the less extrime side we also have the fact that the Vatican did not want people to use condoms until just a short while ago, even tough that could have save lot of pain and lives in Africa.

I hope we can take away the position of power of religious institutions. People can still believe what they want, but we should not want religious institutions in power.

A more content related reply might come later :-P