> Slavic peoples were considered to be people of an "inferior race" who were unable to assimilate into American society.[4] They were originally not considered to be "fully white" (and thus fully American), and Slavic peoples' "whiteness" continues to be a debate to this day, but most people consider them to be of Caucasian culture

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One of them is just some 24 minute movie.

The other is false. The Immigration Act of 1924 did not establish any category of "inferior" races or countries.