Again....But it's never the guns!

[kılıç_mehmet]

Well, maybe its time you should re-write it. It's not as though it was Godsend, eh?
Guns should not be available to everyone, though I'm not opposed to allowing guns to people who wish to wield it for a purpose other than mass-murder/assault, or thievery.

How does one measure someone's patriotism? And why is that important?

Well you can, obviously. The smallest form of governmental representation usually knows the people in a community and can actually determine whom they should allow to bear arms.
That is important due to the fact that a patriotic person will not use a weapon in order to commit acts of violence with malign purpose or unlawful monetary gain. You can count on these people to form a militia in times of dire need, whereas you can count on criminals, psychos and people of dubious reputation to use these guns against the people and the state in times of war and disaster.