This war started when BRICS was formed to replace the US dollar as the reserve currency, that is an existential threat to the US. Granted the US has taken advantage of the reserve currency, printing money and forcing the rest of the world to bear the burden so it is not unreasonable that they would take issue with the way the US has abused this privilege. Trump's attack on Venezuela was all about this currency war. The only way BRICS can become a viable alternative to the US dollar is if you can buy oil with it. If the US can seal off Venezuela and Iran from selling oil via BRICS then their currency will collapse.
Evidence of this currency war is the fact that Gold has increased tremendously in price and silver has gone from less than $20 an ounce to $120 an ounce prior to the invasion on Venezuela. Not only is Venezuela a major oil exporting nation but they are also a major producer of silver.
If the US loses reserve currency status we could see hyper inflation similar to other countries where dollars will be as worthless as leaves are in the Fall. We could see $100 soon equal to $1. Imagine having $1 million dollars in your retirement account become equivalent to $10,000. That is what this war is over.
Normally way more going on than most understand. So, they do what they need to do, get condemned by many for it, and we survive the economic war another day, or they don't do what needs to be done & we lose our economy and they get condemned for it. Wouldn't it be nice if everybody knew what is really going on and the types of choices that are being made and for what reasons?