Northern Ireland - which side are you on?
Much of the population of Northern Ireland identifies with one of two different ideologies: unionism (which wants the region to remain part of the United Kingdom) and Irish nationalism (which wants a united Ireland). Unionists are predominantly Ulster Protestant, most of whom belong to the Presbyterian Church in Ireland and the Church of Ireland. Irish nationalists are almost wholly Roman Catholic. There is also a small minority of Ulster nationalists (those who want an independent Northern Irish state), whose religious convictions vary.
Politics of Northern Ireland - Wikipedia
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