1) Soup Nazi 2) George falls for female Nazi who thinks he's O'Brien. 3) George jokes about being in "Hitler's bunker" at Play-Now. 4) In the "I'm not gay" episode, Jerry tells George he'd probably encourage him to "goose step in 1939 Berlin." 5) Jerry making out during "Schindler's List." 6) Mr. Pitt's ink smear makes him look like Hitler at the important meeting.
Any others?