HAMILTON — It was expected to be a smooth cruise to victory in a riding staunchly New Democrat for almost two decades under former party leader Andrea Horwath, who quit last year to become mayor of Steeltown. But accusations of antisemitism against NDP candidate Sarah Jama — which she denies — are buffeting the campaign in Thursday’s Hamilton Centre byelection, putting the disability activist and the party’s newly minted leader Marit Stiles on the defensive. B’nai Brith issued a statement Monday calling Jama “a radical activist who has been associated with groups that have frequently targeted Israel,” including the boycott,...