Gromit....the Northern Ireland situation was and still is, very complicated, to say the least. But which religion you belong to is still very germane to the "Troubles". I can say with almost complete confidence that 100% of the IRA were Catholic and 100% of the Loyalists were Protestant. The issue has moved over the years from religious differences to political, tribal and social concerns but religion is still very much an issue.
Sad but true I'm afraid.