The right and extreme gun advocates confuse the Declaration of Independence with the Constitution. The Declaration was a revolutionary document. Signing meant you were a traitor to Great Britain -- All signatories risked the gallows for the act of signing.
The Constitution is a governing document: A compact between states agreeing on a system of government. Once your state signed the Constitution, its population was no longer revolutionary. They were citizens of the US, bound to obey and uphold the Constitution -- a governing, not revolutionary document.
Those who say we need guns because we are threatened by the federal government are putting themselves in the place of the Founders -- not against Great Britain, but against the government of the United States. They are putting themselves in the position of traitors to the current US, as formed by the Constitution (as the Confederacy did).
Therefore, if you believe you need weapons to fight against the US, you are a traitor to the US, just as the founders were traitors to Great Britain.
To argue that part of the Constitution (the 2d Amendment) is for the purpose of committing treason against the same Constitution, is ludicrous and dangerous.
If you decide you are fighting the Constitution, you can't rely on the Constitution to protect the right to do that.