Terrorism
has come along way in the last thirty years or so. If you are old enough you might remember various groups; Red Brigade, Bader/Meinhof, and a few others, including the PLO used to hijack airliners full of people. Remember Carlos? In the early days they didn't crash the airplanes into bldgs. Generally, they would make their point and negotiate their escape back to where ever they came from. There was a few times when aircraft were blown up on the ground but the passengers were allowed to escape
Things have escalated since then and hijackings have led to terrible losses of life and they no longer negotiate with anyone.
A terrorist is someone who does mass murder to make a political point.
With the invasion of Iraq, we have found a new term. The people who were resisting the invasion were called "insurgents". These people are not terrorists. I have a hard time calling the Palestinians terrorists because they are forced to use the cheapest method of fighting back; Dynamite.
Who are terrorists? Terrorists are people who use killing and destruction to achieve political ends. Right now, terrorists are pretty easy to spot, whether they are doing their destruction with car bombs or tanks, or jet fighters.