But a criminal is no longer a civilian? Considering the number of car accidents I've been at fault in, I'm certainly a criminal, and I'm positive that you've committed at least one crime, however unconsciously, yourself. As has nearly everyone. There are no civilians, by your definition.
To me, "terrorist" is a term devoid of moral implications. Long before all this Afghan crap started, I was idolizing Che Guevara, the Cuban Revolutionary war hero who, incidentially, engaged in terrorist activities. If you read Bayo's manual on guerilla tactics, it's full of postassium-cholride time bombs, arson tricks, and sabotage. A terrorist is simply one who engages in attacks in order to demoralize the enemy populace or cow them into submission. It's the defining tactic of total war, a term for what every nation in the world now engages in, and the US pioneered in the 1700s.
And yes, I fully approve of... most of the Palestinian's actions. I find bus-bombing, etc. more than a bit distasteful, but recognize the futility of actively engaging the military. However, the Palestinians are the modern day's American Indians- a people being unjustly driven off their land and systematically exterminated, only they are fighting back more strongly this time. I can dig that, and were I Palestinian, I'd be the one on the rooftops fighting back as the Opressor bulldozed my home and all that I know. I still can understand the Israeli perspective and take it when I wish, but my true sympathies lie strongly in the other camp.