DtG — OK, I just went into the net and read a bit about McGee. Yes, absolutely, I would have killed him. His was a clear act or terrorism and treason which cost the lives of five people who were not combatants in the "war" he had going on in his head.
In the interview he did with BBC he said something to the effect of "if you look at the situation you'll see that we had no other avenues open to us but violence."
Bullshit! You say he was released because of changing attitudes. Did they change to say terror and treason are OK now? I don't think so. From what I saw, he was released as a sop to the IRA to try to get them to stop their thuggery. I doubt it'll work, but apparently nobody learned much from Neville Chamberlain and his appeasement policies.