The Jim Crow laws lasted two years, while the Northern States racist anti-black laws stayed on their books for around a century, from before the civil war to the 1960's.
The hypocrisy on the issue sets my BS meter into the red.
Maybe we understand Jim Crow to be two different things, but my understanding is that southern segregationist laws stayed on the books until the 60's.
But I fully agree that Yankees could be even more racist than their Reb counterparts. When Klan membership peaked in the 1920's, it was strongest in those notorious Deep South States of Illinois and Indiana. Northern enlightenment often lasted only until the first black migrant worker showed up on their street.