Whille I agree with your post I think we are past the point of the US Constitution saving us unless SCOTUS grows some onions.
But the founders did give us a remedy to our problem, The Declaration of Independance coupled with the second amendment.
“The most foolish mistake we could possibly make would be to allow the subject races to possess arms. History shows that all conquerors who have allowed the subject races to carry arms have prepared their own downfall by so doing. Indeed, I would go so far as to say that the supply of arms to the underdogs is a sine qua non for the overthrow of any sovereignty.” -Adolf Hitler
Most liberals have never read anything by Adolf so they cannot understand the OBVIOUS importance of citizens bearing arms.