>>715355128Before the Immigration and Nationality Act of 1965, you couldn't just immigrate to the United States unless you were Western/Northern European. Asians and Southern/Eastern Europeans were only allowed in to be used as a slave class since slavery was outlawed, but they accepted wages so low it was practically slavery (much like Mexicans today).
Asians and Southern/Eastern Europeans were seen as subhuman by the vast majority of Americans. Hence why the US rounded up all the Japanese in the country and put them in concentration camps when they joined the war and didn't give a flying fuck about the legality.