Really? When was this passed?
Immigration and Nationality Act
These make for interesting reading.
Note particularly the statements on the 1952 veto by Truman and the response when the veto was over ridden. This is a LONG war.
Immigration and Nationality Act of 1952
https://en.wikipedia.org/wiki/Immigration_and_Nationality_Act_of_1952
The RATS reversed and perverted it in 1965.
https://en.wikipedia.org/wiki/Immigration_and_Nationality_Act_of_1965