I always try to watch the webcasts and I can't help but cringe so hard when they start chanting 'USA USA USA', every single time. What is up with that?
please explain why this is a bad thing? American industry pushing the envelope and the people doing it aren't allowed to have pride?
Obviously the SpaceX staff can do whatever they want when they're celebrating a successful launch and landing. But all non-Americans who are watching and also feeling a lot of pride in what the company has achieved instantly feel alienated when the chant gets going because it's exclusionary. Whether the staff care about this alienation is another matter, but it's real. If you browse the /r/spacex subreddit you constantly see comments about the chant whenever it happens. And that is a community made up of almost total SpaceX supporters.
To give maybe a shallow analogy, it's like a group of men achieved something and then celebrated by chanting “Men, Men, Men!”.