Mexican Americans did not object to the segregation of Blacks or challenge the assumptions of White supremacy. On the contrary, they supported strict segregation of Whites and Blacks in the schools and in public facilities. The basis for their claim for social equality was that they were also white...
A group of Mexican Americans, mostly urban and middle class, founded their own organization in 1929 in Corpus Cristi, the League of United Latin American Citizens...
LULAC sought to set the racial record strait. In a 1932 article in the LULAC News titled "Are Texas-Mexicans 'Americans'?" the author asserted that Mexican Americans were "the first white race to inhabit this vast empire of ours." Another member of LULAC boasted that Mexican Americans were "not only a part and parcel but as well the sum and substance of the white race."
As self-constituted Whites, LULAC members considered it "an insult" to be associated with Blacks or other "colored" races. In 1936 a LULAC official deplored the practice of hiring "Negro musicians" to play at Mexican bailes because it led to "illicit relations" between Black men and "ill-informed Mexican girls." He urged fellow LULAC memebers to "tell these Negroes that we are not going to permit our manhood and womanhood to mingle with them on an equal social basis".
Zinn, Howard. A People's History of the United States: 1492-Present. United Kingdom, Taylor & Francis, 2015.