OTTAWA — The leaders of two prominent Canadian Jewish groups are questioning the approach police and Crown prosecutors are using when it comes to protests that have been condemned for targeting a Jewish business in Toronto and an antisemitism conference in Ottawa. Videos shared on social media showed a group of protesters, including many holding Palestinian flags, gathered in front of a Toronto restaurant this weekend, where some in the crowd could be heard calling it a "Zionist café" — referring to a movement to establish, and develop, a Jewish homeland in Israel — and chanting for a boycott. "Lines...