Just for the record: 290 people were killed on 3rd July 1988 when the USS Vincennes shot down Iran Air Flight 655. I think most people around the world saw that as act of terrorism.

There is a fairly convincing case that the Lockerbie atrocity in December 1988, in which 270 were killed, was a reprisal by Iran, and nothing to do with the Libyans at all. (The fact that something is a reprisal to an atrocity of course doesn't in any way stop it being criminal, whether it's carried out by Iran or Israel or Palestinians or anyone else.)