The right to Liberty necessarily precludes slavery, especially since ALL men are created equal. However, there is no decree in the Declaration of Independence or right enumerated in the Constitution whereby the US Federal Government can do what it is trying to do.
Fighting to eliminate slavery - with the ancillary issue of States not being able to continue the practice of slavery which violated the Declaration of Independence and the Constitution - is radically different from the fight against Obamacare, especially from a States Rights issue. The States are not fighting to keep an immoral, unconstitutional institution running, but to keep such an institution from being established.
You made my point better than I did. You don't trade one form of slavery for another.
I very much underscore and agree with your last point, but I believe it necessary to point out that slavery violated the spirit of the Constitution, not its letter, and to whatever extent the Declaration determined the moral goals undergirding the Revolution, that did indeed lead men to finally determine that human bondage without due process of law and as a consequence of foul play and misdeed was fundamentally unjust and should never be permitted.
Which all means that slavery was an institution that men of the best will would wok to eliminate. It did not mean that 600,000 Americans had to die in order for that to happen, nor that whole states in the South should be leveled in order to bring a region to heel, because that is exactly what happened in the ‘Civil War’ (scare quotes for obvious reasons: a civil war is between combatants vying for control of the one central government. What we had was a war of conquest by one set of states against another).