Lizzie, no apologies needed
A collective is always named after the most relevant characteristic it has. The same way you won't call a group of centroafricans as a group of blacks, because the most relevant characteristic in a context is that they live in central Africa, or that you won't call a group of esquimals just finnish natives.
The semantics do mean, because calling these bastards "a basque separatist group" is calling them not by the most relevant characteristic, but by a characteristic that they share with other collectives that surely don't have anything to do with them. Does Al-Qaeda members be muslim? Yes, does it characterized them as a collective? No. What characterize them is that they are terrorists. Same aplies here.
I don't mind who the victims are: Colombian civilians, paslestinians, israelis, spaniards, americans or whoever suffers from this kind of modern barbarism. When a group of criminals have the ultimate goal of terrifying common people by the use of violence and force, this group is called a terrorist band. Point.
And Pim is right: There are two sides, the ones who kill, and the rest of us who die.
I have friends with members of their families dead. Some days ago (before the Bernabeu bomb) it was near my home where was the bomb. I can only think what if the bomb catched a member of my family, a friend, or someone that I just known, only because he passed through the street where the bomb was placed. Uhhh, Basque separatism? Terrorism!
Fernando