One of the most common non-anti-Semitic criticisms of Israeli policy is to compare Jews with Nazis and Gaza with a concentration camp. The Nazi comparison is here not anti-Semitic but pure coincidence and Israel could have just as likely been likened to any other evil dictatorship and not just the one that was allied with the "Palestinians" and killed so many Israelis' grand parents. (I am assuming a momentary slip in the humanity of non-anti-Semitic critics of Israeli policies.)
Non-anti-Semites have interesting ideas of what "life" in a (real) concentration camp was like or what the Jews had done to Germany. (Apparently Jews were terrorists.)
This article has a few pictures of starvation in the Gaza concentration camp:
http://www.mererhetoric.com/archives/11276033.html
(Look at the picture showing the bananas. Just like Auschwitz.)