Ireland's feuds aren't sectarian, they're ethno-nationalist. We call them "Protestants" and "Catholics," but really what those names mean are "the group in Ulster and especially in Belfast, whose ancestors colonized the land for England, and a few who cooperated with them" and "the rest of the country whose ancestors lost their war and had to put up with being second class citizens oppressed by the British military and police well into the twentieth century."

And even if the British monarch is a figurehead today, the legacy of violence goes back to the Tudors.