What would be the tripwire resulting in open rebellion? Examining the Bill of Rights, and considering EXISTING laws only, and not failed attempts, you will find that every clause has been violated to one degree or another.
Documenting those violations would fill volumes, and it is important to remember that only government can violate the exercise of unalienable individual rights and claim immunity from retribution. We omit martial law or public suspension of the Constitution as a tripwire. The overnight installation of dictatorship obviously would qualify as "the tripwire," but is not likely to occur. What has occurred, what is occurring, is the implementation of every aspect of such dictatorship without an overt declaration. The Constitution is being killed by attrition. The Communist Manifesto is being installed by accretion. Any suggestion that martial law is the tripwire leads us to the question: what aspect of martial law justifies the first shot?