This much is true, however the racism accusation is a red herring. It is true now as was then, this "Cold" Civil War is about the relation ship between the Federal and the State(s). The first Civil War was about states rights, and here we are again.
This is like deja vu all over again. -- Yogi Berra
No. Civil war was not about states’ rights. It was about the Federal power to control territories, like the North West Territory which banned slavery. Republicans wanted to ban slavery from the territories. Democrats wanted to extend slavery to the territories, and intended (and attempted) to invade territories as necessary to get slavery in the territories.