Ah, friend, America was importing people from Africa. Indeed “import” is rather more apt in this case than the several other you’ve ignored (e.g. the mass immigration from Vietnam at the finish of that war).

What a horridly dull country it would be were your understanding nearer the truth; what a betrayal of its dream to wish it as you see it; how silly you would seem to your know-nothing antecedents so lumping “Europeans” as one (it is an irony that in their comparatively more nuanced racialism they at least understood a little more of that continent’s ethnic and cultural diversity).

You are fear mongering here. I do think immigration is double edged, but if you look at the statistics I posted it is very far from replacement level. If you would prefer to have immigrants from the EU instead, then something needs to be done about Brexit.

> If America had instead been grown by importing people from India or Africa, the American Empire would not exist.

Oh man, wait until you learn about American history and where we imported people from—it is going to blow your mind.

Ahh, so you want to lock down the border between the Republic of Ireland and the United Kingdom, because if you drop 1 million citizens of Ireland into London they also don't simply become British but are just Irish living in London.

The Welsh might have a comment about how much the British government tried to erase the native culture and people who lived on those isles for thousands of years before various foreigners came in on little boats. How are the native Cornish speakers doing these days?

The American Empire grew in no little part by specifically importing people from Africa to work as slaves.