We have got to eliminate the gringo, and what I mean by that is if the worst comes to the worst, we have got to kill him.
Source, in full
quoted in "Racial Tactics Backfire", an article on page 12 of Texas Monthly Vol. 4 No. 7, July 1976. According to Brian B. Behnken on page 184 of the 2011 book Fighting Their Own Battles: Mexican Americans, African Americans, and the Struggle for Civil Rights in Texas this was said at a MAYO rally in 1969.