Like Irish Catholics and Orange Lodge Protesants? That happened in Canada, not just in Northern Ireland. Ian Paisely used to go on fund raising trips to Canada and the USA, shadowed by someone from the IRA NORAID side who would say that is all lies, give us money instead. One of the IRA fund raisers got arrested in Vancouver after his fingerprints were matched to a UK terrorism watch list. He got a good lawyer and was released on a promise to appear, then disappeared until he was arrested by USA Border Patrol Agents, deep in the BC Forest, with a weapons shopping list. The Troubles in Northern Ireland settled down when International Monitoring of funds transfers that was intended to shed light on funding of Moslem terrorism also revealed millions each year flowing to both sides in Northern Ireland to keep the tribal warfare pot boiling. Once that was identified the USA had to get serious about stopping it and UDR Orange Lodge and IRA NORAID fund raisers were both banned.