Student harassed by teachers on Facebook

My daughter made a comment on a friends Facebook page, where two teachers, one in her school, not a personal teacher, clearly didn’t like her conservative views and they let her know it. I warned them to back off, where the one teacher headed over to my daughters personal page, harass her and let her know the school has been “watching her Posts too”.i emailed superintendent, 5 days later, they want me to send them everything, keep questioning me like I’m lying. It’s all there. I did my research. After 4 th email asking ridiculous questions that I answered over and over, I told them I’m contacting a lawyer.