BY the time of Kissinger’s tenure as Secretary of State, I frankly doubt he was in physical shape to nearly beat a man to death. I’d like a cite for this as well.
Makes sense in a weird way.
(a) Most countries, the concept of free speech is not the sacred concept it is in the USA. Many other considerations trump it. ( David Ahenakew - Wikipedia )
(b) Germany has had its problems with rabble rousers, IIRC - they reserve the right to act when possible if someone sits across the border and spews hate propaganda aimed at disturbing the peace inside Germany.