Being a former victim of bullying Aizawa-sensei, ofc he hate those bully eventho the victim is the daughter of his bully dats y he didint side wit the daughter's bullies. Soooo i guess dat Aizawa sensei blind eyes when he knew dat she been bullied cause he want the daughter have the taste of being bullied but in the end he help her cause he hate a bully. Anyways aizawa sensei wants the daughter to hate his own father cause if she know dat his father was the one who bully aizawa sensei for 20 years and make those scars at his hand im pretty sure his daughter gonna srsly hate him cause she oso know the feeling being bullied.
It just my guess tho ( ̄へ ̄)
Dis frekin girl getting on my nerves justt tell him wat happened