Crazy Eddie in your second (original) post you reported that some members of a loyalist gang were killed in the Miami Showband Massacre, I do not think this is fact ??
Whatever reasons may be put forward to rationalise British Government and Security Forces collusion with terrorists within their own (British) jurisdiction, there can be none for any collusion that might have allowed loyalists to plant bombs in the jurisdiction of another, friendly, State. Or can there ?