Regarding her First Amendment rights, they should be protected. Was there anything in her contract that stated she could not make generalized comments about her students? Some parents are clueless as to the fact that their little darlings aren't as wonderful as they perceive. Nor do they discipline the kids at home.
We just had to move our child from one school to another, due in part to bullying. The students in the old class were out of control. Yet even after repeated attempts by the principal to deal with the problem, many of these kids were rude and obnoxious. I had for several years volunteered in the classroom, so I know how poorly behaved they are. Sometimes I wanted to request a course in basic manners.
What ever happened to addressing adults with respect? How about children who can actually be quiet during class, and treat each other with respect? If we really care about our children, we will give them rules to live by. And that includes being able to function in society. How can we consider ourselves civilized if our offspring are out of control? Laws in the adult world exist so that we each have the opportunity to pursue life, liberty, and a chance for happiness. Children need to learn how to behave, and the sooner the better.