You don't hear a lot about many of them because there are only so many hours in the day:

* https://www.gunviolencearchive.org/reports/mass-shooting

Compare the list of Canada which fits on one page (going back to 1689):

* https://en.wikipedia.org/wiki/List_of_massacres_in_Canada

to the US, which has page-per-year breakdowns:

* https://en.wikipedia.org/wiki/List_of_mass_shootings_in_the_...

Canada has the sixth-highest firearm ownership rate, yet has a death rate lower than many EU countries:

* https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...

* https://en.wikipedia.org/wiki/List_of_countries_by_firearm-r...

So firearms aren't alien to Canadians, and yet the number of blood baths occurring is much, much lower. Incidents do occur:

* https://en.wikipedia.org/wiki/Toronto_van_attack

* https://en.wikipedia.org/wiki/2018_Toronto_shooting

but much less frequently.

You say political agenda, but your own source lists the most recent vehicle attack as occurring last year, and no casualties occurred. Multiple mass shootings have claimed tens of lives in the past few days alone.