Serena Makofsky has written a well researched, well reasoned and opinion piece supporting the teachers strike in Oaxaca, at this link.
She spoke to public school teachers and parents of children in the public schools as the basis of her research.
Uh, yup I am married to Serena, and we live in Oaxaca. Our kids are in a private school, but we believe in supporting the teachers union in Oaxaca. The alternative is to support the PRI and the government. No contest.