Frank Dimant, its chief executive, described it as an "inexcusable display of hate by Quebec student protesters". He said it demonstrated "just how low the level of public debate has fallen".
He said: "The actions of these protesters, whether for the purposes of deriding Montreal police or drawing attention to their cause, defile the memory of the Holocaust and remind us just how quickly antisemitism and the manifestations of hate can venture their way into our public discourse."
Martine Desjardins, president of the Quebec Federation of Students, admitted: "We think it was an error in judgment that they used that sign."