What defines a terrorist?
The guy overpowered a vehicle full of civilians, cut the operators throat and had that vehicle slam into something and kill/injure people. Sounds like terrorist to me. May not be from the same "cell" or group, but it fits the definition in my book.
Witnesses say he was behaving in a threatening way, a way that instilled terror into their lives. Then he used violence and terror to promote his views.
I heard a radio talk guy say the events of the 11th match up with polls taken of people before all this happened. The polls were "what would you do if" questions. What would you do if the restaurant you were in was robbed? What would you do if you were mugged? What would you do if you were carjacked? All the questions were about you being involved with a violent situation. The answers were either A: Comply with criminal, or B: resist or try subdue the criminal.
Less than 10% polled said they would fight or resist. Only 1 plane had passengers who succeeded in subduing/fighting their hijackers. Did the other 3 planes have a crew that went after the hijackers (by crew I mean everyone on the plane)? We dont know, and we have to assume "no" from the evidence we have seen and been told about at this point. I hope the next time a poll like this is taken more people answer with "B", and mean it.
If people on that bus were nervous about this guy, and saw him making his moves, why didnt someone react? Maybe there was not time to react in that case? I hope that is the reason. It goes back to know your surroundings, stay alert, stay safe and stay alive.