They allow immigration of convenience. Minister Rempel is a shining example of this. While her focus on Yazidis is commendable, Yazidis are a core constituent part of the CPC base, being Xtian. A better motive would have been rescuring as many well-meaning refugees as possible. Hell, I'd focus on all persecuted sectors, whether atheist, LGBTQ2, Yazidi, women, families, etc. 
It's identity politics writ small, and Ms. Rempel looked like nothing so much as a talking-point model when the media asked her what SHE would do with the asylum claimants. No policy, no idea, no solution. Tick tock Michelle, elxn in 2019. Get some policy.