Mott the Hoople
Sweet Jane
Exactly and then there's the little fact that the seceding States specifically list the threat of the abolition of slavery as their primary reason for seceding in their respective articles of secession.1) The cause of the Civil War was the CSA attack on Ft Sumter.
2) Yes, the Civil War is incorrectly named, since the south was not attempting to take control of DC.
As for secession, which is a related event, but still a separate one:
3) States rights were never a question. The south was not being threatened with overt, immediate abolition. In fact, Congress was passing though a proposed amendment which would have guaranteed slavery's legality in the existing slave states. This did not satisfy the south, however, because of the belief that slavery needed to spread or it would die. The amendment also couldn't prevent a long-term outcome of the west being settled free, and forming a 3/4 majority coalition to one day abolish slavery was offensive to the south.
4) Then and now, no one has ever really been able to explain what matters the federal government was cutting into, and preventing the states from managing. Back then, the federal government did very little, and it remained that way for decades after the war.
Any argument that the Civil War was not started by the Southern States, that slavery was not the primary cause and that it was not an act of treason are irrational arguments that ignore the cold hard facts.