"The slavers failed that test."
You keep calling the Southerners "slavers" as if you didn't know that Northerners also held slaves and supported the right to slave ownership. At the end of the war slaves were no longer held in the Southern states and yet
were still held in the Northern states. A very strange outcome for a war that was supposedly all about slavery.
Abraham Lincoln, First Inaugural Address:
"I have no purpose directly or indirectly to interfere with the institution of slavery in the states where it exists. I believe I have no lawful right to do so, and I have no inclination to do so."
And you would pretend that they were equal offenders when in truth the slave ownership of northern states would be measured as a tiny fraction of a percent while the lowest percentage of any would-be confederate state was Virginia at 26%.
Every northern state had either outlawed the practice or had a defined timeline to emancipation. ZERO southern states could say the same.
Abraham Lincoln, First Inaugural Address: "I have no purpose directly or indirectly to interfere with the institution of slavery in the states where it exists. I believe I have no lawful right to do so, and I have no inclination to do so."
Lincoln spoke those words to assure the southern states that they didn't need to do anything stupid. They did it anyway.