Newgolddream, I probably should point out that I live, as I always have, in the west of Scotland. I did manage to avoid much of the sectarianism, in part because no-one in my family cares about football (despite my father growing up a stone's throw from the home of one of the Old Firm teams). I also take exception to any implication that this problem is caused by the majority if Scots, or even the majority of Scots in the west.
I would probably accept, though, that the prejudice on which the violence is based has many shades. I believe that the worst behaviour is at the end of a spectrum that includes behaviour and attitudes that are far less obviously prejudiced but which nevertheless support and perpetuate the prejudice and hatred.
As far as I'm concerned, regardless of other considerations, religiously segregated schools in this part of the world are unhelpful. RC schools might achieve good results but it's not the only way to do that and I think that it just makes dealing with the problem harder. I read today on the BBC website about 2 schools in Oldham that are being merged expressly to address conflict and unrest in the community they serve. Of course, in Oldham, the current segregation of the schools is not official policy and is on racial more than on religious grounds but, still, it seems self-evident there that bringing the communities together is the way to resolve the tensions that led to riots 10 years ago. Why, then, is it defensible that school children should be deliberately separated on such spurious grounds as their religion?