Leaders of the Free Gaza Movement, a U.S.-based organization which has led “flotilla” efforts to break Israel’s blockade of Hamas in the Gaza Strip, used the group’s official social media outlets to blame “Zionists” for the Holocaust. The group, whose board of advisors includes human rights activists such as author Naomi Klein and Bishop Desmond Tutu, posted to its official Twitter account that “Zionists operated the concentration camps and helped murder millions of innocent Jews.” The post linked to a video of conspiracy theorist Eustace Mullins expanding on the claim. The controversy, which went through several iterations, threatens to reignite increasingly trenchant claims of anti-Semitism in the anti-Israel human rights community.

[Photo: David Berkowitz / Flickr]