Don't know if this thread will be deemed inappropriate or if it will start any arguments, but it was made with the best intentions with genuine questions in mind. Basically, what's it all about? I watched Who Do You Think You Are recently (David Tennant's appearance on it), and it tried to explain it, but it got confusing and it's something that I was never taught about at school (surprisingly considering the fact that it still feels like it still exists). I'm 22 next week and I feel ashamed that there's subjects like this that I have no clue about. Basically, all I picked up from the show, was that Ireland became a part of Great Britain (which was considered God knows which religion, I'm guessing Christian), but Northern Island (which I'm presuming housed more of one religion than the other) wasn't happy with this. The rivalry between Celtic and Rangers is billed as Catholic vs Protestant as well isn't it? How? Or is that something else? I've had a look for websites going into more detail about it but I've not found out much to do with it so far, only deeply religious websites that don't talk about the history of the conflict. Don't laugh, at least I'm trying to learn!