Your comments are extremely surprising to me.
I was very involved with my children's teachers, keeping in touch whether there was a problem or not, checking in, etc.
almost every single interaction I had with teachers, administrators, guidance counselors, coaches etc involved them making a statement about how good it is that I get involved, most parents don't, and they wish more would.
With that there is no way any of my children's teachers would know my political beliefs.
My kids attended a suburban reasonably affluent school district.
How are you learning the political beliefs of your students parents?