Well, you might also note in the Declaration that there has to be some reason for the revolt.
And what the South's complaint?
She was not going to be allowed to spread her slave cancer into the free terroitories.
The South rejected the principles of equality in the Declaration which gave men a right to revolt.
They certainly would not grant the right to revolt to the slaves they held in bondage, now would they?
They put down every slave revolt with a vengence.
A people who deny the right of self-government to others cannot claim it for themselves.