OTTAWA — Israel is pursuing a sweeping diplomatic and public relations campaign to convince Canada to change the way it tackles acts of antisemitism. From the office of Israel's president down to its ambassador in Ottawa, the message is the same: Canada must do more to curb threats against Jews. But while the country's ambassador is suggesting Ottawa should limit certain "freedoms" in order to deal with threats his government links to Iran, he hasn't said which freedoms should be limited. "We have a very clear objective this year, and that is to create a significant change in the way...