Hans-Gerhart "Joscha" Schmierer (born 1 April 1942) is a German politician, author, and former radical activist.

He has been a significant figure in left-wing politics and later transitioned into roles in international relations and policy advisory.

However, in a 1969 public forum, Schmierer dramatically hurled eggs at Conze to protest his defense of the Wehrmacht's actions in Eastern Europe.

In a controversial move, he led a KBW delegation to Cambodia in December 1978 to express solidarity with dictator Pol Pot.

[2] Schmierer found himself behind bars for two-thirds of an eight-month sentence in 1975, due to "serious breach of the peace" during a 1970 protest.