The founder of the Occupy Wall Street movement has a history of anti-Semitic writing (more here).
As Pejman Yousefzadeh remarks:
I will only add that since it seemed to be perfectly fair to detractors of the Tea Party to judge the movement by the actions of a few dimwits at rallies, and the presence of a few offensive signs, it should also be perfectly fair to judge the Occupy movement by one of its chief gurus; and the noxious ideas he embraces.
Internet Scofflaw 