Did the Jews have to make the Heil Hitler salute to the German soldiers in the concentration camps?
Using the Nazi salute was seen as some kind of privilege (!) and from 1938 onwards its use by Jews and most Slavs was forbidden. Its use by Poles was expressly prohibited and there were penalties for anyone who used it. Apparently, some Poles changed it to 'Geil Gitler' (something like 'Horny Hitler') and other mocking versions.
Germans were also expected to sign letters with 'Heil Hitler' or with the words 'Mit deutschem Gruss' - which means 'With German greetings' (!)
The use of the Nazi salute and 'Heil Hitler' was one of those things that made Nazi Germany look ridiculous abroad ...