As usual, it's because of the rabidly anti-Israel sentiment of its student population. The latest comes out of Concordia's student newspaper, The Link, which published an Op-Ed which levels a list of charges at Israel that can only be described as astonishing: http://honestreportingcanada.net/Concordia/Link_Geisweiller_Sep2007.htm. Among other accusations, Israel is charged with causing suicide bombing and being a terrorist state.
At what point do those who support Israel say "ENOUGH!"? At what point will the neverending torrent of hate directed at Israel become too much?