My support for gun ownership rights is not universal and unqualified.

[gejohnston]

70. The problems we have the Western Europe doesn't

Only 15 percent of Mexico's murders are firearm related. Most gun murders in Mexico are cartels, who have machine guns, some smuggled through the southern border, some being made by the cartels themselves. In the US, criminals rarely go to gun stores and never go to gun shows, that was according to the DoJ funded Wright/Rossi study in the 1980s.

We have more gangs
We have more illegal drug use, creating revenue for gangs plus poor parenting associated with addiction
With more gangs, you have more gang wars
We have zoning ordnances that prevent not only front yard gardens, but also walkable neighborhoods and nearby jobs
that means we have more automobile use, and health problems associated with it. See lead in gasoline.
That also means our city cores are depopulatied and encouraged sprawl, resulting less connection to the people around them
We have more wealth inequality
Corporal punishment, ie spanking, is more socially acceptable here.
We are more materialistic, stuff replaces relationships and parenting, see the shooter/stabber. Mom and dad sucked as parents
We have more political corruption, especially in cities like Chicago, Detroit, NOLA, whole state of Florida, Oakland.

Each country or even city's problems are unique to that place. There are not one size fits all solutions. BTW, the murder rates were just as low if not lower than when they had no gun laws all in Europe.