If they all spoke a common language, I'd try to learn a bit of it. How exciting!

It's also exciting to experience ethnic clashes between rival groups of immigrants[1].

[1] https://toronto.citynews.ca/2024/11/03/violence-at-hindu-tem...

"Wow all these Goths have moved into my town, but they don't speak Latin, they speak Gothic. How exiting!"

- Anonymous Roman Citizen, 412 AD

It can be a really cool thing too if both cultures open each other to exchange languages and celebrations, but it requires a lot of effort from everyone.

No, I don’t. This is already the case in many neighborhoods in the USA and the sky isn’t falling in those places.

Also, I live in Germany half of the year, and there most of my neighbors don’t speak any English, and my neighborhood is fine. I don’t see the problem you are describing with your example.

If that’s your “extreme” example, I am curious what your day-to-day ones would be.

Perhaps it’s uncharitable but I am having a hard time seeing how this doesn’t alias to simple racism.

I didn't claim the "sky would fall". I just claimed it would affect you.

I think most would agree that it is easier to form connections with those who are more similar to oneself. Call it racism or tribalism if you want, but that's reality.