I am Groot

You have a point but school shootings are not a thing in Canada and in this case the victims were targeted merely for being women. 

Which is why every year we see candlelight vigils and repeated condemnations of 'male violence against women' and demands for further gun control. Ie, it can be used to push certain narratives.

Yes, it is used to push different narratives, I can't dispute that.

Almost three times as many men die from firearms but then women own very few firearms in comparison to men. 

Stats also show that alcohol is a bigger factor in non gang related shootings than anything else. Not surprising when you think of drunk driving.