People forget in the first civil war Lincoln went out of his way immediately after his election to promise he wouldn't try to outlaw slavery because he felt it would prevent civil war.
It didn't. Because the South wanted to force northern states to return escaped slaves.
So he outlawed slavery during the war as an economic sanction.
Never trust fascist when they say "unless you do _____ then it's civil war".
They'll keep saying it till it doesn't work, then they'll start a civil war anyways