To what end? What follows? Why confine them to barracks? Then you have to guard them. Why not simply kill them?
You are one strange ranger.
"If I'm not mistaken, the State Defense Force is a creation of Congress, with authority delegated to the States."
They're like the original state Militias; 32 USC 109 provides that State Defense Forces "may not be called, ordered, or drafted into the armed forces" (of the United States).
"The notions that the Second Amendment was "meant to keep Congress from interfering with state militias" (Chemerinsky), or "designed to allow states to defend themselves against a possible tyrannical national government" (Bork) are obvious falsehoods. Do you agree?"
Nope.
What does it matter? The command authority can lawfully issue such an order to its units without having to explain the reason. The Second Amendment does not prevent that.
They're like the original state Militias; 32 USC 109 provides that State Defense Forces "may not be called, ordered, or drafted into the armed forces" (of the United States).
So Congress could simply rescind or modify the legislation, leaving the State witout that particular organized force. No help from the Second Amendment there either.
And we've already agreed that the Second has nothing to do with the NG.
So can you explain how the Second Amendment protects a State against a tyrannical central government?