Otto von Habsburg punched an Irish minister named Ian Paisley in 1988 because he accused Pope John Paul II of being the antichrist.

>In 1988, having given advance warning of his intentions, Paisley interrupted a speech being delivered by Pope John Paul II in the European Parliament. Paisley shouted "I denounce you as the Antichrist!" and held up a poster reading "Pope John Paul II ANTICHRIST". Other MEPs jeered Paisley, threw papers at him and snatched his poster, but he produced another and continued shouting. He was admonished by Parliamentary President Lord Plumb, who formally excluded him. He was then forcibly removed from the chamber.[22][23][24][25] Paisley claims he was injured by other MEPs—including Otto von Habsburg—who struck him and threw objects at him.[26][27][28] Paisley believed the European Union is a part of a conspiracy to create a Roman Catholic superstate controlled by the Vatican. He claimed in an article that the seat no. 666 in the European Parliament is reserved for the Antichrist.[29]

https:// en.wikipedia.org/wiki/Ian_Paisley