On the high school level it seems that MEChA is a more of a social club aiding Chicano Students to understand their heritage and providing support to get a good education and go to college. And this is in no way a bad thing.
However when these kids go to college they are introduced to a very different MEChA. The MEChA run by radicalized professors and spewing a supremacist, separatist and Socialist agenda.
You are quite right. These professors aren't telling the student in MEChA that they are planning the Peoples Republic of Atzlan.