if we’re going to ban extreme writing and rhetoric because it may tend to incite violence, let’s start with the Koran

Exactly. Brilliant post from The Intellingencer:

Hundreds of Islamic terrorists say they were motivated to become murderers by The Koran and incitement from a few radical Muslim clerics. That’s a fact, where you like it or not.

Clearly, then, the liberals should – if they have any sense of logic – begin their campaign by demanding the bookstores stop selling The Koran, universities stop teaching courses on Islam, and imams tone down their exhortations. That isn’t going to happen, because the liberals aren’t really interested in curbing hate speech. Their real target (sorry for using the word) is free, vigorous speech that opposes their political agenda.