This civil war is very different than the last one. There are no cannons or cavalry charges. The left doesn’t want to secede. It wants to rule. Political conflicts become civil wars when one side refuses to accept the existing authority. The left has rejected all forms of authority that it doesn’t control.
The left has rejected the outcome of the last two presidential elections won by Republicans. It has rejected the judicial authority of the Supreme Court when it decisions don’t accord with its agenda. It rejects the legislative authority of Congress when it is not dominated by the left.
It rejected the Constitution so long ago that it hardly bears mentioning.