Lazs:
"angus... why would your homicide rate go up? is there something evil about your country that is unlike any other? "
Because there aren't any significant numbers of conceilable firearms, or firearms at all in the circulation. Try to grasp that. The gunlaw is and was strict, and the walls are mostly holding.
In your case, you have the whole country flooded with armament of all sorts, and bans and restrictions are firstly going to affect the honest citizens, and for a long while. And local bans don't do much, when the access is totally different in the next state.
State does not mean country you see, so just imagine how much harder it is to get a gun and ammo into a far-away island, than simply from the next state.
A friend of mine lived in Oklahoma. It didn't take him any scrutiny or anything to buy a .45. He's not even a US citizen. He was absolutely baffled about this, and I think he bought the gun in the beginning as a joke!
For us to get a license, you have to take a course, have a clean record, minimal age of course, exam, police interview, and then get two "clean" people to back you up. Then you can go shop, everything between .22 and 30-06 or so, and 12 gauge, even automatic up to 5 shots, and 5 shot pumpguns as well. But no automatic handguns.
We don't live in the world of armed felons, and don't want to.
Then answer this. Why is your homocide rate so much more, as well as rape and armed robbery, not to mention assault with a lethal weapon resulting in wounds. Is there anything evil about your country or could it be that crap like that is easier due to the fact that most people can be expected to be overarmed?