Transcribed from part of a debate with Sam Harris:
Imagine the Koran exactly the way it is, but with one additional line "If you see a red haired woman on your doorstep at sunset, cut her head off". Just imagine a text like that which makes it down through the ages and is still there today. I can tell you what kind of world we would live in: a world in which red haired women are found murdered (in the Muslim World)... we would open the NY Times and read that 20 heads were just found in a bag and they were all red haired women. We would also live in a world in which Apologists for Islam would look at that behavior and say it has nothing to do with Islam. They would say things like "there was a news story last week where a Mormon man killed his wife and she had red hair" and "Many of the women who's heads were found in the bag were not actually redheads - some were strawberry blonde" and "some of the women were shot and not decapitated, but clearly only decapitation is sanctioned in the Koran" etc. This is the type of gymnastics we would be faced with.