SCOTUS decisions are the final word, until a constitutional amendment is passed negating the ruling, or the supreme court reverses it’s ruling in another case. That is how are system works.
Most certainly the United States was meant to be a nation and has been a nation since July 4th 1776. George Washington himself told us in his farewell address that “The name of American, which belongs to you, in your national capacity, must always exalt the just pride of Patriotism, more than any appellation derived from local discriminations.”
In other words we should think of ourselves as Americans first before anything else.
Then we should stop all efforts to eliminate the killing of unborn children? SCOTUS is the final word, and they say killing unborn babies is legal. Further, any attempts to make it more difficult to kill an unborn baby are illegal. We should just give up and accept the killing of unborn babies? Or perhaps, SCOTUS gets it wrong sometimes. Perhaps too SCOTUS was influenced more by the war result than the actual Constitution when they ruled secession illegal? SCOTUS does get it wrong sometimes.