I find your insinuation that by simply chanting U-S-A an entire group of people can be described as classless and without dignity to be troubling.
I work at SpaceX. I was not born in the US and although I now hold US citizenship and consider myself thoroughly American, I usually refrain from taking part in these chants. I do this not as a kind of silent protest against them, but because I simply don't like showing such outward exuberance as I have an extremely reserved personality. I’m the kind of person that would prefer to sit quietly during a sporting event rather than shout or clap. With that being said, the U-S-A chants don’t bother me and it's somewhat disheartening to see them consistently brought up as reflecting poorly on the employees at SpaceX.
I will also add that as an American even I have sometimes, particularly during my childhood living in Texas, felt uncomfortable with some of the more boisterous ways Americans tend to express feelings of national pride, so I can understand why others may find this troubling. It took me some time to realize that in the overwhelming majority of cases, there is no malice or jingoistic sentiment behind these expressions, and in fact I don’t even view them as exclusionary. It may be difficult for someone who hasn’t spent a lot of time living in the US to understand just how innocuous and widespread things like the USA chants are. Its simply something that is easy to say and catchy, while declaring pride in your country.
There are many employees here who aren’t natural born US citizens whom I see join in the chants. In fact, I’ve seen non US citizens working here join in as well.
I understand that I say this having adapted to American cultural norms, and I’m trying my best to be understanding of the opposing views. I personally don’t find it difficult to feel a sense of wonderment, respect and admiration towards the accomplishments of other countries, even when those countries view said accomplishments as matters of national pride and I am finding it hard to understand why so many others seem to be bothered by this.
It’s also important to note that the space program is, in my opinion, one of the few things that still elicit a strong sense of national pride and achievement across political lines here in the US. The American public still today seems to be aware of the broad national policies that have led and continue to lead to the achievements of our space program and rightfully feel a sense of pride in their successes. The accomplishments of SpaceX don’t exist in a vacuum and many of us working here realize a shared sense of gratitude that we owe the American taxpayer.
I also find it a bit strange that in my experience other nationalities, in particular those from Europe, tend to view Americans as rather close minded and without much understanding of foreign cultures. While I agree that in general this is definitely something that Americans need to work on, in this case I’m struck by the irony of the commenters here singling out a cultural “quirk” as has been described by others, and subsequently drawing negative conclusions about it despite the fact that I can see no way in which the U-S-A chants can possibly be misconstrued as denigrating of any other countries.