WHat happens when all the white people flee to another country and it’s all 3rd world immigrants and socialist politicians. The left, repeat, the left destroys every place they take over.
Don't worry, leftism is a self-correcting problem. The left's biggest enemy is themselves. Some of the best places to retire to in the world are recovering from leftist destruction. A trait of many communist countries is they are surprisingly conservative and are now nice places to retire to, for example still communist Vietnam. In hindsight the Vietnam war was a waste of both American lives and money. Leftists always destroy themselves when left to their own devices.
Legal immigrants to America still tend to be above average. For example most Americans have a net positive view of Chinese immigrants. However, China itself if full of "yellow trash". We get some of that, but the overall American impression of Chinese people is that they are good looking, hard working, and smart. That's not the average in China at all.