“But the Confiscation Acts of 1861 and 1862 gave the government the power to seize private property without compensation if that property was used to the benefit of the Southern rebellion.”
See U.S. constitution, Amendment V . . . “nor shall private property be taken for public use, without just compensation.”
Of course, by that time, the north had already taken up arms to overthrow the U.S. constitution.
Once Cain decided to slay Able, what was one more violation of the constitutional covenants?
So if you rob a bank and the police arrest you and take your gun without compensating you then that's a violation of the 5th Amendment? Who knew?