Open this photo in gallery: Fred Hahn, President of the Ontario Canadian Union of Public Employees (CUPE), speaks at a press conference at Queen's Park, in Toronto, July 16, 2018.MARK BLINCH/The Canadian Press Ontario Premier Doug Ford and national Jewish groups are denouncing a prominent union leader for issuing social media statements celebrating “resistance” and criticizing Israel in the wake of deadly attacks by Hamas over the weekend. Fred Hahn, Ontario president of the Canadian Union for Public Employees, which represents almost 300,000 workers, issued posts on social media platform “X” that Jewish groups say celebrate the massacre of hundreds...