US Gun Violence Highest In The World

Take a look at this report comparing gun ownership and the gun homicide rate in several countries around the world. We're at the top in both categories:

http://www.mintpressnews.com/fergusons-isnt-just-about-race-its-about-guns-too/199325/

Why do we have all these guns?

US Constitution, Second Amendment
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

"The security of a free State"? Are we free? Do the statistics shown above make you think that guns make us free?

By the way, the phrase "shall not be infringed" appears only once in the Constitution.