Arizona's New Immigration Law

[CRedskinsRule]

so in the poor man's encyclopedia known as Wikipedia it has the following two entries:
# Operation Wetback was a 1954 project of the United States Immigration and Naturalization Service (INS) to remove about 1.2 million illegal immigrants from the southwestern United States, with a focus on Mexican nationals.

# The Immigration and Nationality Act of 1965 discontinued quotas based on national origin, while preference given to those who have U.S. relatives. For the first time Mexican immigration was restricted.
(List of United States immigration legislation - Wikipedia, the free encyclopedia)

How could operation wetback be targeted against illegal Mexicans in 1954, IF Mexican immigration wasn't restricted until 1965? I guess it must mean that even under an open immigration policy a certain amount of people still found it easier not to apply for legal status then to.

Interesting that until 1965 Mexicans could immigrate freely.