The legitimacy of your arguments is somewhat hampered by your hyperbole and inability to cut back on the vitriol painting every gun owner with the same brush. Quite frankly you come across just like a lot of conservatives arguing abortion; I'm sure you and that jackass Alex Jones could have a great time screaming back and forth at each other.Even in light of irrefutable statistical facts, such that the US has 10,000+ gun homicides a year, while other modern civilized nations in the range of 50-100, these gunfreaks still can't accept the truth, and when cornered and obviously outgunned both mentally and statistically, will just fall back on the blanket statement that "it's my 2nd amendment right", as if some demi-god last week just descended from the sky and dictated "thou shalt have the right to wield assault rifles", and is not in fact a document written before electricity was invented and the best gun you could buy was a flintlock. Ridiculous.
It may be redundant but I feel like it's necessary to point out that the majority of REASONABLE gun owners out there have no problem, and even support, the idea of restricting access to guns for those who are either mentally handicapped or suffer from metal instabilities etc. Gun owners have just as much, if not more, desire to never see someone commit a crime with a firearm as anyone else because we all know that every time it happens there is a new call for restrictions and bans to be put into place. If gun control wasn't always a knee jerk reaction to events and instead took place in an environment that wasn't already poisoned and biased one way or the other because of recent events I think a lot of the reasonable issues such as improved background checks, the somewhat mislabled gun show loophole etc could be resolved.
You also point out that the issue is not inherently with the guns but with the crazy people that gain access to them and yet you go on to advocate for outright bans and confiscation which is exactly the mentality that causes all the normal gun owners out there to react with alarm when mention of gun control comes up. It becomes very tough for gun owners to engage in debates about the issue of gun control when the anti-gun crowd treats them as if every single one is a mass murderer who just hasn't acted yet. When some idiot drives 140 mph on the freeway and crashes we don't all clamor to ban fast cars or talk about banning alcohol (again) when someone kills another person in a DUI and yet it's become perfectly acceptable to discuss banning firearms rather then dealing with the underlying symptoms of the violence that exists with or without them.
Lastly the idea that the 2nd amendment was written in the 1700's and thus shouldn't apply to modern firearms is silly; do your 1st amendment rights not apply on the internet because it wasn't invented yet? The courts who have looked at that exact issue say that they actually do. The the constitution is a document that has to be interpreted based on the time in which we live, you can't cherry pick some amendments to modernize and others to simply leave as they stood when it was written. This is not to say that perhaps someday the courts will decide a different interpretation of the 2nd amendment but as it stands currently they've made it clear that Americans do have a right to own firearms.