>The handguns used to murder almost all come from over the border. The way this intersects with the border and US foreign and trade policy re: Canada is hard to avoid. Free exchange with the USA increasingly is seen as a vulnerability.
The elephant in the room...
Where do the people who murder come from? Immigration from certain parts of the world could also be seen as a vulnerability. There is a trend that no one wants to admit, So when you have a certain type of person who is violent and killing people, perhaps it is the type of people we are letting in, they are incompatible with Canadian/Western values.