All the examples you cite of the federal government militarily crushing citizen dissent, are from bygone eras, where such actions were commonplace.
No one in our government has that sort of backbone today, nor do the American people. If there’s to be a secession of one or more states, it will not provoke violence in this age.
Nor did secession, or slavery or tariffs or any other such cause provoke violence in 1861.
What provoked violence was the Confederate military assault on Union troops in Union Fort Sumter, April 12, 1861.
On December 7, 1941 such history repeated itself, but this time on a global scale.