No? you don't have a problem with Corbyn's links to the IRA, because it isn't "current" yet you do have a problem with Gerry Adams...
Look, it's quite simple. I have a problem with him being PM (or leader of Labour) because of his past. Clearly many don't. That's fine, I'm not trying to convince anyone otherwise, but I do like to see consistent reasoning.
As far as Gatland is concerned, if I lived in her constituency, I wouldn't vote for her. if she was leader of the Tory Party, I wouldn't vote for her. The fact she became an informant on the IRA still doesn't change my view. So, I agree with you, it was hypocritical.
But, my views on this are not shaped by propaganda put out by the Tories or the press, it's just a personal thing. Deciding who to vote for clearly involves policies and what goes with them, but sometimes it's just a personal issue that swings you one way or t'other.