Canada currently has a higher number per population of radical Islamists than does the US. Canada has also exported more terrorists per population than the US has done. In short, Canada has a major problem with radical Islamic terrorists using the country and its  citizenship to wage conflict around the world and to carry out acts of violence that are considered war crimes. Canada has not been immune to the blow-back from this, as we saw in 2014 when a radical Islamist charged his way into Parliament intent on killing the Prime Minister and the Cabinet.