Thinking about this, there are odd quirks about Northern Ireland that seem so normal to people who live there.
If Protestant, you might have good individual friends who are Catholic but still have nightmares about being asked to say the Hail Mary in a nightclub.
If Protestant, you might be wholeheartedly committed to the peace process, go bravely to Nigeria for your gap year but never dream of venturing down the Falls road, even in broad daylight.
If Catholic, you might think your Protestant mate is a top lad but still feel more relaxed if your boss is Catholic. Not because you think a Protestant boss would be trouble but rather because you know there definitely won't be that kind of trouble if he or she is Catholic.
If either religion, you might have individual friends (of the other religion) that you would never acknowledge as friends to certain friends who share your own cultural background. You get good at living in different worlds where necessary.
Many young adults reach university without having met very many people from a different culture. Many go through a process of feeling intimidated, uncomfortable and finally surprised because it turned out everyone was normal.
Regardless of religion or political persuasion, you might automatically 'want' certain political outcomes but in the cold light of day, want to keep your job and your peaceful way of life a lot more.
But everyone is united in listening to the BBC news on the radio saying 'X happened in Derry Londonderry...' (they really do call it that) and think (why don't they just call (insert Derry or Londonderry as appropriate) by its name??