Well I can answer this several ways. First of all I believe all of the "terrorist acts" "they hate us" jargon, was and certainly now is greatly over hyped. If I believe 9/11 was a false flag, it is certainly not to much of stretch to believe other events were false flags as well. But of course that's not to say that these religious fanatics did not commit any terrorist act. I would never say such a thing. But I believe it is over-done, and some events in the past could be false flag events.
Next while some of these fanatics may have wanted to do this, I don't believe they had the means. Now I know what you are thinking, 19 men some box cutters, that's not really a lot of resources. But think about it, we're talking about a loose group of people that to be planning this for years. They had to go to flight training, figure out A/C security, stay close knit enough that no one would give the plans away. Seems hard for a group that is very loosely connected.
Finally and what I believe is most important, almost all horrible acts in history, committed on a big scale, were about greed and power. Now I know you can say, there's been a lot of wars fought over Religion, and there still are. But I believe that religion is only being used to brainwash individuals to fighting these wars, for the leaders of these people to gain wealth and power. If it wasn't Religion they would be brainwashed by something else. If the official story were true, what did it get them? How would the people who organized be any better off? For me it makes sense that humans have not changed and that this event was done by those who wanted more wealth and power. Which is what we see every day, a police state is closing in our rights are being stripped. 9/11 was used a pre-text to all of this.