> Your entire comment assumes people of different cultural backgrounds cannot collaborate on technical challenges.

No it doesn't. It's not black and white. Of course, some amount of cross-cultural collaboration is not only possible, but desirable. But there are also challenges that need to be managed, and some degree of shared assumptions that need to be instilled. If you don't carefully control and limit immigration to a sustainable level, you get stuff like this: https://slate.com/technology/2022/07/caste-silicon-valley-th...