A young Calgary man who is believed to have been killed in Iraq fighting for ISIS was “dead inside” long ago, says his former best friend. Social media reports on Friday said Farah Mohamed Shirdon, a 21-year-old Somali-Canadian, had died overseas. It’s unclear when he joined the terrorist group Islamic State of Iraq and Al-Sham but in an ISIS video that surfaced four months ago, Mr. Shirdon can be seen burning his Canadian passport and threatening Canada and the United States. ... On a Twitter account believed to belong to Mr. Shirdon, a tweet from June read, “Beheading Shias is...