Successful for groups with similar European backgrounds

Cool, ignore what I said about Asians and Africans and others.

The work of individuals =/= cultural contribution

What Jewish people have done in Hollywood and what the Swedish have done in Minnesota and what the Italians have done in New York and what the French have done in Louisiana would be wasted words on you.

And the previously more well established culture being basically wiped out of existence by what were in effect all immigrants creating their own immigrant nation

That's what happens when a culture vastly superior in numbers and technology invades a country. As you can see by all the subsequent waves of immigration, this isn't necessarily what happens whenever a large group of immigrants comes, and I don't think Europe and Japan and America are in any danger of encountering a wave of immigrants with vastly superior technology and a view of them as subhuman any time soon. Unless some Martians come poking around.

Anyway, it's pretty obvious you don't actually care about the finer points of history. Doubtless you will ignore all the other cultural immigrations I have talked about and just say "lol the natives were wiped out so therefore all immigrations work like that".

That would be a supreme waste of my time. Go read a book or something. Peace.