He escaped denazification at the end of the war by quitting his professorship, allegedly for health reasons, losing the pension from his University.
[1] Hirsch studied at the Humboldt University of Berlin where his teachers were Karl Holl and Adolf von Harnack.
Shortly after the Nazi seizure of power he wrote: No other people of the world has a statesman who is so serious about Christendom; when Adolf Hitler concluded his great speech on May 1st with a prayer everybody could feel the wonderful candor therein.
[2]In 1933 Hirsch signed the Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State.
[4] Hirsch was a leader of the German Christians and an advisor of Reich Bishop Ludwig Müller.