Dylan Robertson, The Canadian Press Supporters of Israel and prominent Jewish groups rallied Monday on Parliament Hill, calling for an end to antisemitic violence in Canada and for solidarity with Israel. "Our sorrow is deep and immeasurable," said Raquel Look. Her son, Alexandre, who lived in Montreal, was killed by Hamas militants at a music festival in Israel in October. "We want to channel this immense pain into a call for action. This tragedy is not just a horrific personal loss," she said. "It is a wake-up call to our politicians. All of them." Look's son was among an estimated...