America was occupied when ‘discovered’ by Europeans. Killing the local inhabitants, capturing their land, and bringing boatloads of indentured servants, (white slaves) was the next move.
Replacing indentured servants with African slaves was another way to gain workers and was considered cheaper.
When slavery was abolished getting workers was done by encouraging the arrival of populations of unwanted people from European nations.
A statue was placed in the Harbour which had the motto;
“Give me your tired, your poor, Your huddled masses yearning to breathe free, The wretched refuse of your teeming shore. Send these, the homeless, tempest-tossed to me, I lift my lamp beside the golden door!”
This was to make those immigrants feel welcome.
Making immigration difficult is new.
It is done to appease the poor whites who can’t find manual labour because of immigrants; legal and illegal.