The terrorists don't have to use suicide tactics themselves if they can coerce someone else into doing their suicide attacks for them. THAT is what ETA and IRA did, and that makes them all the more despicable for it.
My point is this: what if your family was being held at knifepoint and you were told to go into work as usual, only you had to cooperate with the terrorists who were going to be on board your flight or your family dies horribly? Would that make you a terrorist? Of course not - to be put in that situation doesn't bear thinking about. But that is why terrorist organisations don't have to recruit pilots - they can pick on any pilot.