It's easy to assume that a cultural issue is due to nationality or ethnicity, but actually culture varies hugely between companies and even teams. At a previous place, which did a lot of acquisitions, we had one Israeli team join us who were impossible to deal with, and we started to assume that that's what Israelis were like, and then we had another Israeli team join who were lovely to work with.

Of course there are some things which a particular nation do on average, but within nation variation is usually greater. Also one always gets a biased sample, so what appears to be American behaviour can actually be the culture of big tech in California founded within a generation by VC funded entrepreneurs.