They did this because they have nothing to lose and can show off their technical prowess. What exactly is the world going to do - sanction them and stop buying

They did this because they have nothing to lose and can show off their technical prowess. What exactly is the world going to do - sanction them and stop buying nearly everything from their factories? I fear the US is going to seriously regret building up China with all our economic business instead of building up all of Central and South America.