The dirt isn't magic. The people are the country. Replace them and you replaced the country with something different.
We've been outvoted on the welfare state issue by the left and all their imports, legal and otherwise, congratulations.
You destroy countries by destroying their cultural roots. We're a dying tree producing rotten fruit.
What made America, America is mostly gone. America is a zombie of alien (foreign) powers wearing it as a skinsuit.
The country actually died some time ago, we're watching the second death, the dying US empire with foreigners fighting over the carcass.
There are millions of illegals here at this point, and it's generational at this point. As you correctly point out. This shouldn't have happened, but your "deport the people and deport the country" line is sort of saying that if you deport all the illegals you ARE deporting the country.
I don't support illegal immigration but there is a practical issue with the magnitude of the problem. Current estimates are like 3.3% of the population is illegal. That's about the same as the number of native americans living in the US, or about half the size of the entire Asian population in the US. That's a huge deportation.
The US is entirely country of immigrants except for a tiny fraction of natives. The Revolution was fought by largely British people, the Pilgrims were from North Englind and Netherlands, Pennsylvania was populated by Scottish and Germans. Texas, Southern California, Florida was populated by Spanish (and literally was spain for a long time after the revolution). Detroit used be called New France. Plenty of Chinese came to build the railroads of course, and big chunk from Africa. So, at what point do you plant the flag in the demographic ground and say it stopped being America, and which ethnicity do you claim to be the "true" American one? Which one of the cultural roots is the right one? Just wondering.
Also the US welfare state is one of the leanest and most minimal welfare states in the world. You could almost say the US doesn't even have a welfare state. If you don't like welfare, the US is a global success and not a failure.