It merits careful scrutiny for the following security reason. If I'm the HR director of a very nasty group in the Middle East seeking to do damage in Canada or in our like-minded allies, I would be focusing my recruitment efforts among the stateless who are physically present in Canada. They're ripe for recruitment. We must collect the empirical evidence and track this group carefully. We cannot leave them without remedy.
On April 21st, 2016. See this statement in context.