I'm not saying terrorists don't have an end goal, in fact lacking such a goal would in my opinion make them just random psychopaths. But for terrorist, acts of terror against civilians are the primary means of achieving their agenda.
So, you feel that half of the 9/11 guys were terrorists then? The guys aiming at the WTC were committing acts of terror and the guys aiming at the Pentagon and White House (I think that's where the one that crashed into the field was going) were not?