Then why were the Articles of Confederation and Perpetual Union created, and a "more perfect Union" created by the Constitution?
And if you want to go to the Supremes as the absolute source of Truth, then Texas v. White made clear that there was absolutely no way to withdraw from the Constitution or the Union whatsoever.
The founders brutally put down rebellions themselves. Why is that manifest intent not relevant, but the writings of one person are?
Because the Article of Confederation were failing. The preamble statement of the intent to create a more perfect union is because the one they had immediately after the Revolution was broken.
And you apparently aren't reading what I'm saying. The supreme court decides US law. The right to separate yourself from an abusive government is not in but is above the Constitution. It's also documented in the Declaration. The fact that the founders, as British citizens, exercised the right to succeed indicates it's something that you can do. The omission from the Constitution is not meaningful. If States do not have the right to succeed then how did our country get going? Do you claim we are actually rightfully British?
And the writings are of many, many people and different positions. If you looked at the primary source information I suggested, there are writings from Washington, Jefferson, Hamilton, Franklin, Paine, Adam Smith and dozens of others.
But, getting back to the topic - I assert that our militia is neither well regulated nor well equipped. It would be beneficial to apply some regulation and then to qualify the unorganized militia and allow them to have more than the modern day equivalent of a pitchfork.