I always thought the Soviets were behind the assassination attempt against the Pope. There's no big surprise there.
Same here as well. The Soviets had all the motives to want to assasinate John Paul II and all the means to do so. If he had died they would have been rid of a staunch anti-communist on top of the world's largest religious organization and would have to fear less about the Pope, and other agents in the West working in cooperation with the Pope, destabilizing Poland and Eastern Europe.
Also I believe the original article had an error in it. Mehmet Ali Agca was a Bulgarian national of Turkish decent, as are 10% of the population of Bulgaria, not a Turkish national living in Bulgaria.