First, I think he was a little naive to say what he did, having said that, he has a point, because whenever 'Peace Keeping Troops' are deployed, they become a focal point, and as long as they are out there, there will never be a peace.
Take Northern Ireland, for example, in the end, it was the politicians who have agreed a soert of peace, although the tensions will never die, and the likelihood of of the troubles restarting, is quite high, (sorry Nox), thats my view.
Back to Iraq, I don't know what the solution is, probably no-one does, but we can't now come out, after the mess we've made of it, if we come out, we'll leave behind a country that in all probability, once, and if, the internal fighting stops, a country that will become a base to attack us from.