I agree. The USA would never indulge in anything like secretly undermining a foreign power's government, would it? Besides, there was never any reason to try to undermine the British government.
By the way, has anyone ever noticed how important it is for Presidential candidates in America to win the Irish Vote when campaigning for a place in the White House, and how many have or claim to have Irish ancestry (even when this cannot be demonstrated). True, some of them seem to have come from Ulster (the part of Ireland loyal to Britain), but they seem not to make so much of that aspect of their ancestry, for obvious resons.
Count them since the Troubles began in the mid sixties ... call Nixon the first of them at that time to claim Irish heritage ...
Scary huh?
Now, you all know I'm the last person on this site to make unsubstantiated statements or cast aspersions, but wouldn't you all agree now that one person's terrorist can look so much like another country's President?