Then you do have sympathy for a campaign of terrorism that lasted decades. You have sympathy for the terrorists who bombed my home town in the UK and killed a couple of little kids. Or that blew up whole blocks of Manchester in the 80's. Who tried to murder the UK's PM twice. Who attacked Canary Wharf etc etc...
The man has ended up giving his life to ensure a peace of sorts exists in Northern Ireland. And you castigate him for being a 'doublecross'? I would phrase your words carefully mate, cos for those who have suffered at the hand of IRA terrorism it isnt a subject to taken lightly or with any mirth.
Like I said before I don't agree with the IRA (their goals or methods). I was simply stating that it probably wasn't wise to publicly admit his spying and expect the IRA not to take action.