"The corporations own the government" made sense for a while, but Trump has done enough to hurt said corporations lately that I'm actually starting to question that idea (it's definitely true for the majority of Democrats though). The only real reason I can think of where it would make sense to do stuff like this is to cause a crisis making it easier to abuse power later on.
The owners of the corporations own the govt. They are loyal to no company and no country. They can take their money anywhere, but so long as they are in the us they would prefer that the tax burden be shifted onto the people and off of them, with as few restrictions as possible on their own behavior.
The owners are still quite happy with trump. It's all of the littler con voters who are hopefully now reconsidering their vote.
Maybe, but threatening your customers who are buying your exported goods doesn't seem like a good strategy, and US-based corporations already dominate in the US, so it's not like they're helping the US become more powerful unless they're preparing for WW3.
It's not the corporations, it's the billionaires that run them. Every time Trump does something that makes the stock market drop, they get richer by scooping up more for less. Than sell them when Trump says "Just kidding" and the stock market rises again.
Not to mention that all of their companies get to raise prices and blame "tariffs" in order to increase their profit margin.
It's the entire reason they paid to get him into the white house.