Except that it is simple not true:
single men were excluded due to security concerns, not because they weren't at risk.
Single adult men are very much at risk in war-zones - or any other form of violence, e.g. by being conscripted at gun-point to fight in the war (and soldiers have a habit of dying).
If you look at what the news report you see the real reason:
http://www.cbc.ca/news/politics/cana...lies-1.3330185
The official government site state that it is due to security concerns:
http://www.cic.gc.ca/english/refugee...ome/phase1.asp