Yes, I am well aware that culture changes and evolves over time. Obviously, 21st century Chinese culture is very different than 11th century Chinese culture and the same goes for French culture, etc. However, there is a big difference between a culture evolving naturally over time and a culture being rapidly and artificially changed in a short period of time via mass immigration. It is also important to note that culture just like technology still retains aspects that are hundreds to thousands of years old. We still use forks that are a relic of the 4th century, but we use them alongside cell phones. The fork was not replaced with another utensil like chopsticks, it was retained while new technologies were added for other uses.
Language is a good example of that, a part of culture that is preserved for lengthy periods of time despite clothing, music and other aspects of culture constantly changing. I guess my point is, I don't mind if current cultures add aspects to its existing culture, but I do mind if cultures are artificially replaced with new ones. Ideally, I would prefer if existing cultures keep adding and evolving within their existing framework or foundation rather than mixing in several cultures to form a new one or worst case scenario where foreign cultures replace old ones. I suspect that mixing in cultures to form a new one is likely the highest possibility out of the three scenarios. Anyways, I want the change of culture to slow down, not be stopped completely.
Yes, because even with fewer immigrants especially the ones that immigrated already, American culture will still change and improve, just not as dramatically.
No worries.
Yes, that is true, but I believe you are underestimating the pressure from outside influence. You said it yourself, the main reason the US put a man in the moon was because they lost to the Soviet Union in the space race in many instances.
Replace Soviet Union with China and Space X and you can get a similar situation happening in this century. It won't happen until the 2030s at the earliest or even much later, but I believe it will happen some time in this century and in our lifetimes IMO.
https://www.space.com/china-moon-base-10-years.html
https://www.theverge.com/2019/7/30/2...n-starship-aco
Yeah, I am well aware these are likely exaggerations and the real date will be much later, but I suspect the intention is there regardless.