[laotzu]

The Union had slaves before the Confederacy.

The Union kept slaves after those in the Confederacy were freed.

If the Confederacy had freed their slaves, the Union would still have been against secession.

Explain how these facts fit with your contention that the war was about slavery.

[Ditto]

If the Confederacy had freed their slaves, the Union would still have been against secession.

ROTFLMAO. And if Hitler had only been a pacifist and Stalin had only been a humanitarian ....

[Ditto]

Explain how these facts fit with your contention that the war was about slavery.

Where did I say that? The Confederates seceeded over slavery with the "Black Republicans" and Black Lincoln" as the excuses. The War was about preserving the Union.