If you are speaking about insurgent groups in the Middle East, it's sort of confusing. I would suggest that even ISIL isn't a terrorist group, at least in the same sense that the word terrorism has been used throughout the past 100 years. ISIL represents 30k mobilized personel, are made up of a huge number of disparate factions (some fighting for a three state solution - which would actually be a great improvement in the organization of the middle east, whose lines right now were drawn by the British and have nothing to do with historical or cultural boundaries), are fighting with traditional armies with traditional warfare weaponry and because they are fighting for political change in a state where authoritarian governments with financial and political ties to outside nations has limited how much they can represent their people. ISIL to me, if I use textbook comparisons, looks more like an grassroots insurgent army fighting for political representation. How could an army of 30k people be 'terrorists'?

'Terrorist' is the new 'communist'. It's a label you put on someone you want your people to fear and hate.