It also states explicitly that the right is for defense of the State and not the individual,
That is actually a point of contention. It is unknown what exactly the Founders meant by "free state". It is assumed they used the word "state" to mean the political entity, but they could just as well have been using the word "state" in the "mode or condition of being" sense.
However, even if we agree they used "state" in the political sense, the part of the 2nd Amendment you are referring to is in regards to to formation of militias. The right to bear arms is a separate right in the 2nd Amendment and the wording on that is quite clear: that right belongs to the people and it "shall not be infringed". We know the right to form a militia and the right to bear arms are separate because they are separated by a comma, just like the four separate rights protected by the 1st Amendment.
There are also Supreme Court rulings dating all the way back to 1886 that establish the right to self-defense and the bearing of arms to do so as an individual right, not a "militia" or state right.
The states = the people
as in the 10th Amendment: The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
Not only that, but the 2nd Amendment itself very clearly states that the right to bear arms belongs to the people. And for those who like to bring up the "well-regulated" part of the Amendment (even though "well-regulated" back in 1789 meant something different than it does today), it may say "well-regulated" but it does not say "well-regulated by Congress". That means any federal gun laws should be struck down as unconstitutional and any gun regulation should only be allowed at the state level. However, state laws must also comply with the Constitution of the United States, and that Constitution very clearly states that (say it with me class) "the right of the people to keep and bear arms, shall not be infringed."
Those things don't exist because the Framers believed they were optimal. They exist because they protected slavery from abolition,
You're point? Even if the original purpose was to protect slavery doesn't change the fact that our system of government provides a lot more protection for the few from the "tyranny" of the many than most other systems of government. It also doesn't change the fact that giving the minority opinion just as loud of a voice as the majority opinion is a good thing. You just don't like it because you perceive yourself as being in the majority and are getting frustrated that being in the majority isn't giving you any more political power.
Remember: A good idea, even if implemented for the wrong reasons, is still a good idea.
This is such an utterly ridiculous statement it is hard to believe you mean it seriously. Cars are regulated far more heavily than firearms. FIrearms are in fact virtually unregulated in this country.
I don't have to ask the FBI for permission every time I go to buy a car, nor am I prevented from buying a car if I am convicted of a felony. But whatever, let's go with the "cars are more regulated than guns" thing. Cars are more regulated than guns because you don't have a right to keep and utilize a mode of transportation.
Also let's assume your factually false statement of "FIrearms are in fact virtually unregulated in this country" were true. They should be unregulated. Why? Because every other right in Constitution is also unregulated so leaving guns unregulated would just be consistent with the law of land.