I blame the principal; apparently the teacher has been pushing an agenda all year but it took a candid camera episode to bring about correction.
I think we all know nice folks with ideological blind spots that lead to irrational behavior, and maybe that's what we're dealing with here. As a professional, each teacher should keep his personal irrationality out of the classroom, but it's the principal's job to make sure all the teachers maintain a neutral playing field for ideas, and I guarantee the principal knew that this one teacher - and how many more just at this one school? - were violating that principle on a daily basis.
Hopefully the incident will be a warning to other teachers across the state and the well-meaning ones will modify their behavior.
It is good that this teacher was caught in the act.
Normally, I would say that cell phones in the classroom are a bad thing (which is how I believe this was recorded).
Maybe the left will start to behave knowing they might be recorded.