Some maybe, pretty much all orgs in the US are infiltrated and there's splinter groups and such. I'll just type up observations from college and such and then go from there.

As for MEChA in my experience and reading was always on Chicane rights, community building, anti-imperialist, anti-capitalist, pro-labor as emphasis, ofc there are those ultra vocal nationalist types but generally they were seen as weirdos because there is so much more to a nation that just reminiscing and geolocation alone (Stalin and Fannon insert here), there is material reality and history for starters. Every school chapter was different on political leaning, depending on conditions, area etc, and minus those general emphasis sets there were no hard rules. We had a MX ML speaker at my particular chapter and the libs were terrified of his shitting on neoliberalism, some lib speaker brought lil bitty tea cakes and had a fundraiser and pissed a bunch of people off, etc, those sorts of things were common. Only thing generally shared between branches was Chicane rights, pro-labor to a degree, and community building.

Unlike say the Panthers and such, MEChA and the Chicano movement in general was deeply affected/terrified of the red scare or being accused of it, one part because of the community being so devoutly religious, especially Catholic, other part because of the 2nd, 3rd and 4th red wave scares perhaps (or that's what I figure). This really hamstrung the movement and all orgs related, ngl, but the joke goes by not being radical leadership would say even back ye olden days, that they wouldn't get whacked like <insert name here>, however, this made people including leadership not have the theoretical understanding to be a bit resistant to infiltration attempts, or milquetoastification. So eventually MEChA would get you a belt of honor upon graduation, not kicked out of school. You'd also get easily reducible and erasible reform instead of core changes. Anyway, this was in the late 2000s, back in the 60s-70s no idea. In those days there was some overlap with the Native rights movement since part of being Chicane was reconnecting with indigenous ties, and some of that was a reconnection with the land, and I'm sure this was abused by alphabet agencies, or misinformed people especially since investigative theory wasn't much a thing, but jumping immediately in to an issue with only so much study was.

Rodolfo Gonzalez and some student activists founded MEChA as part of the broader Chicane rights movement, Caesar Chaves and Dolores Huerta are recognized with the agricultural reforms in CA (which only went so far, like I said about hamstringing), others were involved like Oscar Zeta Acosta (aka Buffalo Zeta, or more well-known as Hunter S Thompson's lawyer friend, he was also the movements' lawyer, when he got disappeared stuff went south fast).

Zeta made that joke too, he still got whacked in my theory, so much for that. A threat to the system is a threat.

The org was huge on doing community outreach/aid sort things in the 2000s, like feed/tutor the lil Chicanes or disadvantaged schools around the college, babysit laborer's children and similar. I figure it was similar back in the day. There were a few Chicane militants even in my day but they weren't involved in org activities much, so suspicious in retrospect. They'd be that guy who would be all talk and no action.