It is the very linchpin of American Democracy.
Do you think you would have the right of assembly? Or the right of being safe in your home and among your effects? The right to really say what you want?
You see, no other country does.
France? Nope! Great Britain? Nope! Canada? No! China? Hahahahaha! I make joke!
These governments have a right to walk into your home, tell you that you can't rally or tell them to go to HELL without consequence. And sometimes dire consequence.
Europe even brands speech as "Hateful"!
Can you imagine? And they call us in the U.S. "Uncouth".
The early British invaders of the North American continent took over the place because they had guns and the Indians, for the most part, did not. Now it is said that this still might not have been enough had it not been for European diseases that the indigenous population had no defense against but one has to believe that having guns helped a great deal.
Guns also helped win the United State's independence from Great Britain. The significant part about this was that the British had flintlock smooth-bore muskets and the new Americans had...flintlock smooth-bore muskets. The British had cannon, lots and lots of cannon. The Americans had cannon too although not nearly as many but the SAME KIND of cannon and many of an equal size.
The armaments that both sides possessed at that time were, allowing for the disparity of economies and quantity, were essentially of equal technology.
And in this crucible of rebellion the reason for the 2nd Amendment was forged.
To insure that there isn't a disparity of arms of the people in contrast to the government.
Now lets face it, back in the days of the very crude flintlock non-rifled musket, it wasn't all that easy a thing to shoot someone. To avoid a flint splinter in the eye, soldiers often aimed and then turned their head to fire. Also, without "rifling", the spiral grooves gun makers later cut into the inside of a rifle barrel to make to bullet go straight, the bullet could go lots of places other than it's intended target. My theory on why the young George Washington wasn't killed at the opening of the French and Indian war at Fort Necessity, where he was a sitting duck, is that the French were probably AIMING at him.
Now here we are today with the most accurate armaments time has yet to bestow. Guns are now capable of killing a number of people quickly. But the disparity between what the citizen has access to vs what the military has at their disposal has widened considerably.
But that gap hasn't widened to the tipping point as long as we still have access to semi-automatic weapons.
So it isn't a surprise that these are declared enemy number one even though they've been around since 1885. Yes, it's a part of our history but it's not SETTLED history. The fight to keep the right to bear arms is the fight of the people vs the government itself. Not for armed revolution, but to always have the option.
The U.S. Constitution would not have been ratified by the people without the inclusion of these rights since suspicion of a federal government was high. And knowing what we know and seeing what we've seen...
There's still plenty of reason to be distrustful.