This article does not point out all white teachers are racist, its pointing out that white teachers do not understand not only black students, but ALL students of color. I am a person of color in addition to being a teacher for 5 years in a private school with a mix of students from different economic backgrounds. I noticed black student many times being sent to the office for being a "problem". Kids of color are taught to question authority, because lets be real, authority hasn't always been the best help for us... A lot of white teachers, although they don't believe they are being racist, have inherit mechanisms which further our slavery educational system. Unless they have had significant dialogue and personal reflections, this will continue. Its no one's fault, just the reality of the situation.
You said your daughter has a master's degree. This means nothing to a student. How can they relate to a master's degree?? They can relate to someone who grew up with the same experiences they are having, and I am sure this is not one of them. Your daughter has no idea what these children are going through, and if she can realize that, she can start her learning process. The children are right.
White parents always criticize people of color for not taking an active role with their kids. But I think active role is defined much differently by both parties. People of color teach their children to survive in a world which they will encounter difficulties 100 times harder then white children. An active role is a much different lesson plan in this situation.
I am not saying your daughter is coming from a horrible place, but you have to critically analyze the situation as a whole. Imagine if all magazines, TV stations, social media had no white images and showed no white role models... Reverse this and welcome to a small portion of what these kids are facing.