Your assertions are simply wrong.
Mexico has draconian gun control and far worse violent crime than the US. So do many nations.
You are comparing America to third-world nations...which is like comparing apples to oranges - can't be compared. Try living in a third-world nation (I've got a house and lots of family in one) for a while and you'll understand why. Just because a third-world nation has "draconian" gun control doesn't mean it's effectively enforced. FYI, in third-world nations, cops are very poorly paid as compared to first-world nations, so bribes literally become a crucial part of their income - can't feed their families without those bribes...and YES, this really is how it works in third-world nations.
I've seen it for myself - I once paid off a judge to get my brother-in-law out of jail on drug and firearm charges. Think about that - if that were done in America, would it make the news? Sure would. But in a third-world nation, it's business as usual.
Canada has far less gun control than the UK, but about the same murder rate and apparently less general violent crime.
Canada and England are both first-world nations, but Canada is FAR less urban than the UK. You've got to be careful to allow for the difference in the nations you're using for your comparison. Try comparing either nation to other nations with not so nearly effective gun control.
Many recent scholarly studies have been indicating that gun control or lack thereof has frack-all to do with violent crime rates.
Try quoting those sources and I'll happily shoot them down.
This marches with what I've been saying since I studied the matter of national gun ownership rates vs murder rates... ZERO correlation with gun ownership.
Have you now? I grew up in Mississippi - gun ownership there is almost expected, not as much for self-defense as it is for snakes and the occasional rabid dog. So I grew up with guns, got my quals and my ribbons and my medal in my twenty-year career in the Navy - all of which means I'm not afraid of guns, I'm not afraid of using or owning guns. That said, ask yourself why it is that ALL first-world nations (including Switzerland and Israel) have FAR stricter gun-control laws than America, and every single one of them (including Switzerland and Israel) have FAR lower homicide rates than America.
High-murder nations had typically most of the following characteristics:
Corrupt or ineffective gov't/LE/courts
This is very true in third-world nations
Poverty
Gangs/factions
Drug trade
The third-world nation I referred to above is the Philippines. I grew up in the Mississippi Delta, and Metro Manila has about 15M people packed into the same area as about half the MS Delta...yet the homicide rate for Manila is LESS than that of Mississippi.
Think about that - there is so much grinding poverty in Manila, far more so than anywhere in Mississippi, and yet it's safer to walk the streets there. Why? Because it's doggone expensive to own a firearm there.
and/or a cultural predilection for violence.
And this is wrong, too. I go back to the example of the Philippines - tick off the local strongman there and you'll be "salvaged", which means you'll be murdered. Gang fights there are rather common - my youngest son likes to tell the story of how he was caught in the middle of one...but the gang fight there was with rocks and broken bottles and fists - the guns are just too expensive for the squatters (who comprised most of the rioters) to afford.
The same is largely true for areas in America which vary in violent crime.
Strongly-urbanized areas - the inner cities - DO generally have higher rates of violent crime...but try comparing the homicide rate of New York City to that of the ENTIRE state of Louisiana - the homicide rate for NYC is MUCH less than that of Louisiana. Why would that be? I mean, conservative dogma holds that NYC would be MUCH more violent than a rural state like Louisiana...but the reality, the hard numbers shows that the total homicides for NYC is about the same as Louisiana even though NYC has more than twice the number of people as Louisiana.
What's the difference? You got something right up above - poverty. Add poverty to ease of access to guns, and you WILL have a far higher homicide rate. BUT if you have "only" poverty without access to guns, you have a FAR lower homicide rat,e - like Manila, where poverty is FAR worse than Mississippi, but has a homicide rate lower than Mississippi, which itself has a significantly lower homicide rate than Louisiana.