Weasel Words alert: No, the Aztlan people want to create a new country out of a big chunk of the American southwest, not return it to Mexico.
The Aztlan people are all Chicanoes who are getting free money for college and aren't likely to really cut themselves off from Washington DC handouts. It'd take a long time to find one of these types who actually worked their own way through college. They're not the brightest though ---they may actually believe all that federal money is just "there".