No, we agree it wasn't a war to end slavery. From the Northern standpoint it was a war to preserve the Union. From the Southern standpoint it was a war to defend slavery.
One side felt states have no rights to secede the other side does!
And why did those states want to secede? Because of what they viewed as the threat to their institution of slavery posed by the Lincoln election.
Try to put aside your narcissistic self. The Southerners just plain didn't like you guys. Willing to die, the boys of the South were, just to go there own way. Willing to stand up to the Federal Monster outnumbered 3 to 1. Nothing noble there.....