OTTAWA—Two prominent Jewish advocacy groups are voicing concerns about anti-Semitism ahead of a public conversation between NDP MP Niki Ashton and former U.K. Labour Party leader Jeremy Corbyn. The planned livestream talk risks pulling New Democrats in a direction “antithetical” to Canadian values, said Shimon Fogel, head of the Toronto-based Centre for Israel and Jewish Affairs, in a joint statement with the Board of Deputies of British Jews. “Jeremy Corbyn is toxic,” Fogel said, accusing a “small group” of New Democrats of undermining party leadership. “It is staggering that given the litany of catastrophic, consequential issues before us, including the pandemic, that this is where some in the NDP want to spend the party’s capital.” The British Labour Party has been grappling with allegations that anti-Semitism was allowed to fester under Corbyn, a longtime supporter of Palestinians and a critic of Israel who led the party for almost five years …