So long as we insist the federal government can force one law, one culture, and one sort of politics on all of America, the US is headed down the road of civil war. Only decentralization and separation can partly defuse the situation.
In 1986, eight governors threatened to veto deployments of state troops to Central America. Washington generals and politicians responded by further destroying state independence and the Second Amendment's militia clause.
The United States is not a nation. From the very beginning it was more of a collection of various nations united by ideas of political unity and by fairly high levels of tolerance for other groups within that union. The US certainly contains nations, but it was never a single nation.