Irwin Cotler is a Canadian former minister of justice and attorney general. Brandon Silver is an international human rights lawyer and director of policy and projects at the Raoul Wallenberg Centre for Human Rights. Hamas’s atrocities against Israeli civilians in recent days have been unimaginably horrific, and their crimes are continuing. At least two Canadian citizens are being held hostage along with more than 100 other civilians. Canada can help put an end to these crimes, and should act immediately to save lives. Those being held captive by Hamas face untold brutality, with every passing moment risking ever-more violent torture....