oomis1105 (et al.) – The assumption is that Streicher understood that the highlight of Purim was the mass hanging of the enemies of the Jewish people (remember it was all the leading war criminals being executed at the same time in 1946). He might have made the connection that the Jewish people had no (direct, this worldly) influence on the trials or executions (carried out by Ahasuerus and the Allies, quite of their own volition).”
No doubt you are right. It just was such an odd thing to say of ALL the things he could say at that moment. How many Goyim do you think really know or care about Purim?