from the heart_out
Unfortunately we  started it. Canada joined the world's bully in Afghanistan, killing Muslims. I am surprise that more Canadians, not only Muslims, have not tried to help innocent victims. Our troops were not fighting for Canada, they were fighting for the US. Certainly as you say (they will harm us). It is retaliation. 

Certainly we should be trying to convince our government to get our troops out of the area. While they are there we can expect to be attacked. Canadian troops there make Canada less safe. For no obvious gain.