A real whitewash.
Too disingenuous.
I knew MeChA and some of its leaders at UC Santa Barbara starting in 1970. I covered some MeChA events, among other things, for the campus radio station. I found the rhetoric pretty scary at the time, but most of the members, even leaders, were just affirmative action admits using the group solidarity to cope with the academic shock of UC.
My most striking memory was of a Cinco de Mayo celebration that went on into the evening amid lots of beer and pot. I was sitting with a group in which one of the leaders was going on about solidarity with blacks. His brother (a draftee) was also their on leave from the Army. As the leader went on, his brother essentially told him off: I don't remember the exact words, but the essence was that if Chicanos had to choose sides between the whites and blacks, they would choose the white side regardless of what the radicls thought, and that his brother was 'loco' if he didn't realize Chicanos were better off in white America than messing around with radical BS. All but a few of the large group cheered the brother on. The leader and some of the radicals were very quiet after that. He later said to me something like 'ya know, my brother's a pretty savy guy, I gotta think about what he said.'