It is difficult to justify why the US is providing militarily support to the Saudis without invoking oil and dollars. They are a pretty shady regime and not the sort of people the US wants to be supporting. And the Saudis don't seem to be trading with America as much as China [0, 1].
[0] https://tradingeconomics.com/saudi-arabia/exports-by-country
[1] https://tradingeconomics.com/saudi-arabia/imports-by-country
So, what would you think is the reason the US invaded Iraq?
It just so happened to coincide with Saddam starting to sell oil for Euros, and France and Germany just so happened to oppose the war.. but it's probably nothing to do with oil and dollars.
Gaddafi wanted to sell oil for Gold. In that case Europe and the US were on board with removing him. Why then, when he'd been in power since the 70s?
Reminds me of one of by favourite Frankie Boyle jokes: "Our government was angry about Khashoggi. We sent the Saudis a strongly worded arms invoice."
Iraq started pricing oil in euros in 1999:
https://www.theglobalist.com/iraq-the-dollar-and-the-euro-5/
Iran started pricing oil in yuan in 2012:
https://www.bbc.com/news/business-17988142
What's our geopolitical relationship with Iraq and Iran now?
[0] https://nsarchive.gwu.edu/briefing-book/iran/2017-06-15/iran...
https://www.brookings.edu/blog/ben-bernanke/2016/01/07/the-d...
Being a reserve currency means any financial crisis in the world tends to affect your currency and trade, not a good thing.
The dollar is not the largest cause of perpetual US entanglement in the Middle East. Oil dependency, on the other hand, may be.
Imagine the headlines if Russia did that in US. Yet they are sill 'allies'
No, but now that the US is a net petroleum exporter, puling the plug on the whole Middle East is a real possibility.
[1] https://www.aboutpipelines.com/en/blog/why-does-canada-impor...