They resented Hazel Bryan because they thought her attitude was exaggerated and that it humiliated white people. Hazel Bryan didn't deserve this resentment, as she was acting on the thoughts they stimulated.
We can arrive at this answer because:
Hazel Bryan was known for appearing in a news photo that showed her screaming at a black girl who was going to study at a white school.
Bryan's attitude occurred as a way to stand against the end of racial segregation.
Bryan's photo made white families feel a strong resentment of her, as they believed the photo was shameful and scandalous.
For them, a good white girl, she was supposed to close her eyes and pretend nothing was happening and not go screaming like a savage.
However, these families were the ones that stimulated the feeling of racism and prejudice against black people. These feelings are what stimulated Bryan to act the way she did, as she was very young and prone to believe in racist concepts.
You could either 1. discuss with the teacher(s) on how poorly he treats the classmates and try to find a way to get him to stop or You could try and talk to said bully about how is making the class feel with how he has been treating them
