Those people were engaged in an illegal act. We are talking about a declaration of secession, unilaterally, by any state or states. That would be illegal. . . .
Every resident of a state that seceded who did not continue to pay his or her federal tax obligations would be in violation of federal tax law as well.
This attitude toward peaceful separation was foreign to the founding fathers. It sounds like the Soviet attitude toward secession when its satellite states had had enough and wanted out.
Senator Henry Cabot Lodge of Massachusetts wrote the following in his 1899 biography of the famous nationalist Daniel Webster:
When the Constitution was adopted by the votes of States at Philadelphia, and accepted by the votes of States in popular conventions, it is safe to say there was no man in this country, from Washington and Hamilton on the one side to George Clinton and George Mason on the other, who regarded our system of Government, when first adopted, as anything but an experiment entered upon by the States, and from which each and every State had the right to peaceably withdraw, a right which was very likely to be exercised. (Henry Cabot Lodge, Daniel Webster, Boston, Massachusetts: Houghton, Mifflin, and Company, 1899, p. 176)
Thomas Jefferson, the author of the Declaration of Independence and the third president of the United States, viewed the Union as voluntary. In a letter to William Crawford in 1816, Jefferson stated that if a state wanted to leave the Union, he would not hesitate to say “Let us separate,” even if he didn’t agree with the reasons the state wanted to leave (Letter from Thomas Jefferson to William Crawford, June 20, 1816).
More evidence can be found here:
Proof that the Union was Supposed to be Voluntary