"'Death to Judah' so the flag says, 'Judah will live forever,' so the light answers," Rachel Posner wrote in German on the back of the photograph.
Dominik Tarczynski is among those offended by Ocasio-Cortez's comparison of southern border centers with Nazi death camps.
The artist's intention was to "show the highest respect for the memory of the Holocaust."
Rebecca Floer, 64, has until November 26 to leave the Israel after her request to remain in the country was denied.
"This is rather disturbing and disrespectful," the Auschwitz Museum and Memorial had tweeted.
Netanyahu claimed that if the Allies had attacked the death camps, they could have saved 4 million Jews.
He's one of only five Americans named as a "Righteous Among the Nations" for rescuing Jews during the Holocaust.