America was initially 13 individual colonies that became confederated states. It was the passage of the Constitution that the individualism of each state began to be erased, and the fact the individual states have abandoned republicanism - although each is Constitutionally bound to assure such a thing. The southern states were never like the northern states, and many worried about the powerful states of Virginia where there were clearly 3 very different men who were prominent during our founding period - Henry, Washington and Jefferson. But there was a glue that tied them, or supposedly did, and that was individuality as espoused through the ideas of sovereignty and liberty.
I have no problem if some States want to recognize gay unions and others don't. I don't have a problem if some States want to legalize drugs and other don't. But I do have a problem that States don't want to protect the life of a child in the womb. The race issue will always be as long as people classify humans via skin color. America was never aligned as you suggest in your post and if it was, I'd like examples of gays fighting to be married in 1799 or women fighting for abortion rights in 1801.
If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy.