The problem is you're cherry-picking your data to support your argument. Try it from the raw data and you get a different picture.
I will list the top nations in order of rates of intentional homicide, also showing their rates of private gun ownership, then show the USA by contrast.
Name.... homicide rate per 100,000.... gun ownership rate per 100.
Honduras... 91.6... 6.2
El Salvador... 69.2 ... 5.8
Cote d'Ivoire... 56.9 ... not listed
Jamaica... 52.2 ... 8.1
Venezuela ... 45.1 ... 10.7
Belize ... 41.1 ... 10
Virgin Islands ... 39.2 ... not listed
Guatemala ... 38.5 ... 13.1
skipping down a bit...
Columbia ... 33.4 ... 5.9
South Africa... 31.8 ... 12.7
skipping down some more...
Greenland ... 19.2 ... not listed
Russia ... 10.2 ... 8.9
skipping down some more...
Ukraine.... 5.2 ... 6.6
Cuba... 5.0 ... 4.8
And finally, well over halfway down the list...
USA... 4.2 ... 88.8
Number of guns per capita by country - Wikipedia, the free encyclopedia
List of countries by intentional homicide rate - Wikipedia, the free encyclopedia
As it turns out, the United States does not have that high of a homicide rate compared to most other countries, and given the amount of privately owned arms we are FAR more peaceable than most on a per-gun-owned basis.
OBVIOUSLY, gun ownership is NOT directly linked to murder rates.
To go further and compare and contrast two 1st-world nations with VERY different rates of gun ownership... try the UK and Canada.
I did a little checking. It is believed that there are between 7 million and 11 million guns, privately owned, in Canada, among a population of about 35 million... and there are also reports that there may be millions more guns that were never registered or "went missing".
So, Canada is not exactly short of firearms. You have far more per-capita than most European nations,
five times as many per-capita as England and Wales, and come in 13th in the world in per-capita gun ownership.
Sources:
HOW MANY GUNS ARE THERE IN CANADA
Number of guns per capita by country - Wikipedia, the free encyclopedia
Canada has five times as many guns per capita as the UK, but the murder rate is barely any higher.... 1.6 compared to 1.2, so murder rate is clearly not proportional to gun ownership rates.
List of countries by intentional homicide rate - Wikipedia, the free encyclopedia
Honduras has the highest murder rate in the world, 91 per 100,000, as compared to the US at a mere 4.2....
Yet the US has a gun ownership ratio of over 88 per 100 residents, while Honduras' rate of private gun ownership is a mere 6.2 per 100...
far far lower than Canada's, about the same as England.
Clearly, private gun ownership and murder rates are NOT directly linked.
As I've said, from my studies it appears that all nations and/or localities with a high murder rate have some or all of the following:
Bad government
Poverty
Drug trade
Gangs or other violent factions
Excessive population density
Put a high level on three or four of those, and you have lots of murders and violent crimes.
There's simply no logic in focusing on the tool used for violence when it is so obvious that this is not the causal factor.