RUP=Raza Unida Party, not sure if they were a forerunner to or affiliate of MECHA.
Yes, I have seen this picture before. You shall know them by the company they keep, I guess. Many of the Chicano leaders are really nasty racists, no doubt funded by the far left. Have you ever listened to a recording of some of these leaders back in the 1990’s? They openly spoke of taking over California and one speaker even threatened to kill the Gringo. You can hear it on this website. Click on “The Takeover of America”.
I think a lot of anti-Semitism comes from a culture of poverty and envy of anyone who is perceived to have more than they have. I think this envy is not only directed toward Jews but probably toward members of their own group who aspire to having a better life. You see the Democrats appealing to this dark side of people when they constantly bash “the rich”.