Mass-immigration in Europe didn't happen until late XX century, when national identities were entirely fully-formed and indeed brought upon us the disastrous World Wars. The cosmopolitan worldview that approves of melting-pots was born in response to the terrible failure of nationalism, which "we" experienced to the fullest.

> it's your own very government selling your society.

It's as much "your" government as it is mine, and I don't feel like they're selling anything, in this particular case.

If you think freedom of movement is bad, do you think capital should also be controlled? If not, why should money be free to flow, but not people? To artificially create "salary jails" to exploit? If you assume that money should move to maximize its potential, then the same should be allowed for people, surely?

Freedom of movement and freedom of enterprise are amongst the highest achievements of human civilization, which we paid for with millions of deaths in the XX and XIX century.