The US head of The Free Gaza Movement, a pro-Palestinian group, unleashed a wave of criticism over the last several days after asserting on Twitter that Zionists ran concentration camps and murdered Jews.

Greta Berlin, the American co-founder of the hardcore anti-Israel group, tweeted on September 30, “Zionists operated the concentration camps and helped murder millions of innocent Jews.” Berlin’s Tweet blaming Zionists for the Holocaust caught the eye of Avi Mayer, who oversees social media with the Jewish Agency for Israel. Mayer was the first to draw attention to Berlin on his tweeter feed, writing  ”-- -- the folks behind the #Gaza flotilla -- reveal themselves to be the lowest anti-Semites.”

Mayer documented the chronology of Berlin’s attacks on Jews and Israel, as well as the Holocaust revisionism of the Free Gaza group, on a Storify blog.

Mayer wrote, "The Free Gaza Movement is the key actor behind the successive flotillas that have sought to violate the maritime closure around Gaza in support of Hamas. It is chaired by Huwaida Arraf, who also heads the International Solidarity Movement (and has endorsed the use of violence against Israel), and its Board of Advisors includes such luminaries as Naomi Klein, Peter Hansen, and Jenny Tonge.”

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