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.
Well, they ignore entirely the part about a militia so the infringing part should be okay.
Except those are two separate parts of the right. The first right is the right to have a well regulated militia. The second is the right of the people to keep and bear arms. Don't try to add a connection where one does not exist. It is funny that you chose the one of two official interpretations that
doesn't support your claim. And then, if you look at the other, where the two parts of the right
are joined, define a militia. It can either be "An official reserve army, composed of citizen soldiers" or it could be "The entire able-bodied population of a community, town, or state, which can be called to arms against an invading enemy." Considering the latter was what essentially fought in the battles of the American Revolution, I'd be tempted to go with that definition. In which case, the right of private citizens to keep and bear arms is protected. Also note that, according to Title 10, USC, Section 311, all able bodied males between the ages of 17 and 45 not serving in the armed forces or state national guard units are considered the unorganized militia, as well as all commissioned female officers of state national guard units.
In other words, damn the Founding Fathers and their ambiguous wording.
People think that banning guns will solve all the problems. The fact of the matter is that most criminals
do not get their guns legally, which means the only people you are in fact keeping the guns from are those that could use them to defend themselves against the aforementioned criminals. One can't really use the UK as a prime example of a successful gun ban either. The rate of violent crime, from what I have seen, has gone up. And you can't really compare the US's violence rate with that of the UK, considering the latter is a few magnitudes smaller, both in area and in population.
Rember, it's not the guns that kill people, it's people that kill people. May it be with a gun, a knife, a piece of pipe or simply a large enough rock, they all are potential deadly, but are not dangerous in and of themselves. All of them can have practical uses: Guns used for hunting and for sport; a knife used to cut up vegetables; the pipe to... well... be a pipe; and a rock, to be a building material or pet...
People have a foolish idea that police can protect everybody. That assumption is baseless. First off, police are primarily a reactionary force. You call them when there is a problem, and they respond. However, that response takes time, much more time than it takes for a mugger to pull a trigger. And since when do criminals intent on bodily harm let their victims call the police, or anyone for that matter? Most of the time the police will arrive at the scene of a violent crime to pick up the bodies, and to collect evidence. Not come in guns blazing in order to protect the citizen. This leaves the citizen to concern themselves with self-defense, because as great of a job that police men and women do, it often is not enough.
All this being said, I don't believe arming teachers is really the right way to go about preventing these occurences. School shootings are not common enough to warrant such a drastic action. It is an unfortunate tradgedy when it does happen, but the rate of occurance is not high enough to warrant such a large policy change. Now, letting teachers carry tasers, that I can see being implemented without too much protest.
And in response to the free speech and flag burning issue, as much as I find burning the flag offensive and distasteful, it is protected under the First Amendment as symbolic speech. The same would go for works of art. I do find it ironic that the same people burning the flag to show their dislike of the US government are only able to do so freely because of the right granted to them by that government. Sometimes, I think Americans are a little underappreciative of just how nice our governmental system is. In some countries of the world, you'd be shot for speaking out against the government.
Oh, and Full Metal Geneticist, Ghandi was a great man, who did great things, but he was one man from one country. Not a citizen of every other country, every other region of the world. And what works in one situation does not always work in every situation. America's revolution took place hundreds of years before Ghandi's movement. Attitudes about freedom and justice changed greatly between the two periods. And never forget, the Americans didn't start a violent revolution. We broke away, the British invaded, and things escalated. I'm sure we would have been more than happy had the transition been peaceful, but we had to fight for our freedom. Two different time periods, two different countries, many different people. Don't be close-minded. Realize that your way may not work for everybody. And remember, India's freedom wasn't bloodless. Thousands of people died. So what if the deaths from the American Revolution were from two sides instead of one? The result was the same, wasn't it?
Oh, and that 50:50 chance you have with the gun? That's a hell of a lot better than no chance at all if you didn't. Just a thought.