I don't think it matters if they were drug addicts and wife beaters, the Declaration says a people have a right to leave if they find one form of government not to their liking.
Now you say noticing this is "Warping" the principles. I think you are simply stuck on what you wish to believe; That the Union had a moral right to stop independence for the Southern States. You are too heavily invested in one side to admit an unpleasant truth.
That's not what the DOI says and certainly not what the Founders intended.