"Our troops are killing Muslims"
I'm awfully tempted to ask you to get a life. Not even the Muslims think that these people are acting like Muslims. Go ahead, take a poll in Mosul. See who wins in popularity.
"Note that every western country which has been attacked previously attacked Muslims."
Why does Al Quaeda and ISIL exist? Are they speaking on behalf of Muslims? Did Muslims bomb the World Trade Center, the USS Cole or the Embassy in Dar es Salaam or was it these groups?
"based on the fact that they are not defending Canada"
By your logic Canada should not have participated in WWII or Korea. You sure you are not related to Neville Chamberlain or involved with the Communist International? They had similar ideas. 
The UN Security Council agreed with the US's activity in Afghanistan (Shock, wonder). That's why Canada was there. Obviously a forgotten fact.
Have you ever considered running for the Green Party? Even the NDP doesn't know what they are talking about.