In what sense is “true” Islam peaceful?

“I don’t doubt that most Muslims are peaceful, but that’s not the same thing as saying that the doctrines and teachings of the religion are peaceful, in the sense of being non-violent and tending towards living in harmony with others. To be sure, I don’t think that human beings are naturally peaceful, so it follows that human beings of all religions, and no religion, can be and often are violent. That’s not at issue. What’s at issue is whether there is something inherently violent within the structure of the Islamic religion.”