I agree with you to a point. Some of the older gang members in the gangs you listed I'm sure dabble in OC, but these ones are most likely connected to La Eme and the other 4 that I mentioned, the veteranos I guess you can say, which means older gang members in Spanish.

Those ones I've listed started off as prison gangs and evolved into organized crime groups later on, like La Eme that originally were a gang of young thugs. They're involved in OC in prison and on the outside.

It's definitely people of Southern Italian ancestry that feel they have a lot of stuff in common with Hispanics. I've actually met one American of full Southern Italian descent that rolled with the Nortenos. He even considered himself one. He quit banging, though. Also, there's a high ranking member of the mob in NY with the last name of Campos who is half Puerto Rican, so I don't think all Italian mobsters are racist towards Hispanic people.