 Cartman dresses like Adolf Hitler , the leader of the Nazi Party ; Cartman occasionally says " Sieg Heil " , a common phrase previously used in Nazi Germany . Comedy Central had reservations about the idea and sought ideas for other possible costumes , but Parker and Stone insisted it had to be the Hitler costume . Once the episode aired , however , the two received very few letters from upset viewers over the costume ; Parker attributed this to the fact that people were becoming more familiar with the Cartman character , and thus recognized that most of what he said and did was usually wrong . More than Hitler , however , Comedy Central executives were worried about the use of Chewbacca costumes throughout the episode because of George Lucas ' well @-@ known tendency to file lawsuits against unauthorized Star Wars references or parodies . The channel contacted his production company , Lucasfilm , about the episode and was asked to send a copy of the episode to them for review . The voice used by the supposedly actual Adolf Hitler in the educational video shown to Cartman is based on Monty Python alum John Cleese 's Hitler impression , which both Parker and Stone particularly praised . 
