Which of that was factually incorrect?
Start with “This effectively ended the slavery problem for the Union states”.
It ended nothing but the state of uneasy truce between the hot-heads of either side. It added immeasurably to the tensions between neighbors and the insurrection introduced us to a state of war.
The slave problem was still there and wouldn’t be resolved until the passage of the 13th amendment.
Perhaps just the simple fact that as al stephens spewed his evil, the flag of the Unites States was still flying over Fort Sumter? Do I really have to spell out the discrepancy between the words of stephens that you parrot and what Lincoln and davis were locking horns over?