Tactically and Strategically the American situation can be compared to the German situation.

Data (could be accurate):

"Germany covers an area of approximately 137,847 square miles, while the United States is approximately 3,791,400 square miles. In terms of area, the closest states in the US are Montana, which is slightly bigger than Germany, and New Mexico, which is a bit smaller."

Things to consider:

America started with a Banker War as the then dominant global power tried to enslave into Debt Slavery all of America.

It was very difficult for the largest Military then on the planet to enslave all of America under exclusive control from the British Crown, and the money managers or Central Bank centered in England. The aggressive attacking forces had to cross 3,000 miles of open water, or encourage locals, including Indians, indentured servants, or African slaves to side with the British. If the secondary goal was to cull the herd, so to speak, then that goal was reached, while the primary goal of arbitrary power over all Americans was driven off by the defenders, at least temporarily.

America could have become the first non-dictatorial (Top down) area on earth since the Swiss example, but that didn't happen. In 1789 a carbon copy of the British system of legal plunder was put in place, complete with a Central Bank and arbitrary power to extort anything worth stealing from anyone in the "National" interest. That usurpation ensured an American Civil War, another Banker War.

Fast forward to the emergence of the Nazi Party, the Bolshevik Party, and the Roosevelt Party.

1. Wall Street and the Rise of Hitler
   [archive.org]

2. Wall Street and the Bolshevik Revolution
   [reformation.org]

3. Wall Street and FDR
   [archive.org]

Current measure of POWER:

National Debt Clock Real Time
[usdebtclock.org]

Will those in the dominant position on Earth buy (invest in) yet another American Civil War?

I don't think so. The current battle in America is moving away from the Crazies (neo-cons, globalists, deep state, criminally insane psychopaths) and moving toward Nationalism under Trump et al.

That appears to me to be a divorce from cooperation with China to disarm Americans, render America powerless in defense, and no-longer a unification of China and America into one Central Bank controlled Corporation (Limited Liability), run from China: Globalist Agenda, One World Government.

That then appears to be a confrontation with China, Trade War, then Military War. The problem with using the past to prepare for the future is such that Modern Warfare is not the same as Warfare in the past, not the least of which factors is technology that includes A.I., Space, and Encryption. See: The Dictator's Dilemma.

As power flows to each and every person, measurable as ubiquitous interconnectivity, the power to control each and every person, to extract whatever can be stolen, or cause specific actions (go to war for example) is no longer that which it used to be.

It may be that the goal of One World Government is gone, and in place is a new age of enlightenment, as power divides once again from a central power to individual powers incrementally going in the opposite direction that in was going up until recent times, such as the election of Mr. Trump.

Will the goal then shift to the secondary goal: cull the herd, and can that be accomplished as was done in every single war since humans have recorded wars?

America is spread out on a large continent and the people are still armed generally and specifically as demonstrated in recent examples of confrontations such as the Bundy Ranch example.

Since Waco there has been a resurgence of individual responsibility in America exemplified in what is falsely called the Militia Movement by the Propaganda Organs of the Deep State. Look into at least the Oath Keepers.

“Dear America:
You are waking up, as Germany once did, to the awareness that 1/3rd of your people would kill another 1/3rd, while 1/3rd watches.”

Look into:
Voices From The Third Reich: An Oral History
by Johannes Steinhoff

Steinhoff was a German Fighter Pilot during World War II, waking up, and blowing the whistle.

As to modern warfare consider reading about another significant Fighter Pilot named John Boyd. Modern warfare was changed significantly by that one man.

Fortunately, I believe this is an erroneous assessment of the situation. Your error is coming from the fact that you are listening to those who get their news from our liberal media. The media from most other countries comes from hearing the media from our country as their data points and then assessing it from they cultural perspective of the country that reports it. If your starting point is flawed data, then your analysis will only be further off once you add your own country's cultural perspective, especially since you don't have the 1st and 2nd amendments that we have.

As for becoming like Germany prior to WWII (as I believe this is implying), If German citizens were allowed to keep their weapons and their freedom of speech hadn't been curtailed, they may have been able to stave off Hitler and his nazi supporters. As it was, good people had to operate in secret and relative silence in order to save themselves and a few others. They certainly couldn't take a stand as those in this nation are accustomed to doing.

The big difference is that Americans will never give up their 1st and 2nd Amendment rights - their voice and their firearms. (Though I do realize Germany never had a bill of rights like ours.)

So the 1/3 that wants to kill us will be sorry. And the 1/3 that just watches is actually shrinking, mostly joining the righteous right! I'm confident and optimistic that the hateful 1/3 are losing ground and will be soundly defeated!

Sure does seem like it, but; I feel like the Socialist will fail this time.