The right to bear arms

In our last English lesson we talked about the American Gun Culture.
Every American has the right to bear arms - this means they are allowed to carry weapons. This right is fixed in the 2nd Amendment.
But why they are allowed to carry weapons?
The reason of this is the American history. When the Americans became independent, they had to struggle against the British government. So they need the weapons to fight against the British army, the redcoats.
Nowadays the Americans are still afraid that the bad government may come back, so they keep on carryng weapons.
The first settlers arrived on the East side of America and moved to the West. The people living at the frontiers needed the weapons to fight against animals and Native Americans. The Americans in the cities still have a stereotype of the so called "rednecks". They are uneducated, poor, fat, ... , and have guns.

Some weeks ago there was a congresswoman shoot in Arizona. The possible reason for this shooting is the health care bill.
I think it's better when not everyone is allowed to carry weapons, like in Austria. There would be less crime and less death people.