Any such 'war' would do nothing but turn our nation into a repressive police state indefinitely if not forever. It will not happen. The days of 'civil war' are over in the US.
The vast majority of Americans WILL NOT go and get themselves killed, fighting their fellow citizens over wealth distribution.
Look, I'll try to explain this with an analogy. When the civil war happened, 'the south' could unify against an enemy - 'the north' and federal government it controlled - as oppressing it and as an enemy. It just wanted to secede; the north had to send troops to prevent them from doing so, and that made for a clear war.
Here's the analogy. Old colonialism had soldiers of the European power occupying a third world country, carrying out violent and oppression, and made for a clear target for a resistance war. In the 1960's, there was a shift to a new type of colonialism - 'economic colonialism' - that was devastating to the third world countries but didn't give them the easy target for 'war' of the colonizing powers' troops. At best, they could go to war against the puppet regime of the colonizer had in - their own people.
Today, there is no target for 'war' - the people are told 'you aren't repressed, you have the vote', even as the economic royals have corrupted our democracy by making their money essential to get elected and making the government serve them against the people. But there's no geographical divide for sides, no clear targets, it would be 'killing your fellow citizens' that seems a lot more like murder than war. The people have been highly conditioned against 'terrorism' - perhaps for a reason.
It's totally impractical - and immoral - to call for 'war'. What's needed is - while the people still have the political tools - political revolt.
Elect progressives - and pass a constitutional amendment against the corruption of our government by the money of the 1% to allow that to happen.
The US is either headed on the road to long-term plutocracy and the loss of a functioning democracy, or to reform.
I'm concerned these protests are 'too little' - they need some organization towards specific political reform. But war isn't going to happen, thank goodness.