Aaaaand that's why you're not really educated. You're selectively ignoring (or at least, forgetting about) context to make it seem like these countries are cesspools of violence when, in fact, it's the opposite.
For example, on the "if Canada were included" part: well yes, but how does it compare to the US? Oh, right: turns out the US has a
much, much higher gun violence rate. Both for murders and suicides. Yeah, Canada would be fourth if it was part of the wider European region, but
that's because European gun violence rates are very low. Even tiny changes in the rates have significant effects on your ranking when the numbers are so small.
Also... "in Canada, about 80 percent of firearm-related deaths are suicides." No shit, maybe that's because gun crime is lower. Did you even stop to think about that? And I
double-checked the suicide rates per capita... the US ranks 48th, while Canada is 87th.
And the Sweden study you provide is kind of a pathetic attempt to prove your case, really. "Oh no, shootings went up in several years!" Until you look at the stats... 33 people were killed in 2015. 33. Those are still tragic, but that makes the gun violence rate a fraction of what it is in the US (for context, in 2013 the US rate amounted to 30.7 homicides
per day). And there were no significant alterations to Swedish gun laws in that time span, so you can't blame the increase on more restrictive laws.
Sit down, shut up and let the adults talk. You're just embarrassing yourself.