Well, I think that, if there were Moslems flying those planes into the twin towers, that they had help from somewhere too. I think that the towers were prearranged to collapse. There are too many firefighters that said that they heard multiple explosions. There was Thermite found there afterwards. There is a credible report that one flight recorder was recovered even though the officials say it wasn't. Most pilots think that these terrorists were not experienced enough to direct those planes into the buidings, including the owner of the flight school that they attended.
I see 911 as a separate problem to the problem of Islamists who want to spread their ideology to the West.