Hmm, a bunch of you guys think Suzuki's daughter getting bullied would get "back" at him somehow. I kind of doubt that he'd suddenly be cured of victim-blaming when it comes to his own daughter. If he found out about it, I think it'd be 80% likely that he'd think it was her fault--that she was weak and pathetic and unable to fit in, so she got bullied. He'd have to re-evaluate his own worldview, otherwise...which he sure as hell hasn't done since his high school years! Man's not about to start now.
The other 20% is the possibility that he'd only interpret the bullying as an insult to himself; viewing his daughter as "his" could make him see an attack on her as an affront to his own "face," to him personally. I think there's a significant chance he would do both: blame her for it and get mad at whoever he pins as trying to get at him (so he doesn't have to judge his own behavior in high school). That lucky target would probably be the MC, come to think of it.
Either way, the bully's daughter isn't an extension of him. Hurting her isn't going to make him feel the MC's pain; the idea that it would do so is predicated on the idea that he's at least partially a good person and would prioritize viewing his daughter as a fellow human being over admitting he was wrong to bully the MC. I wouldn't bet on that! (I also think the bully realizing the error of his ways would be a less interesting story than the MC gradually realizing that he's hurting an innocent person by standing by or instigating the bullying of the daughter out of the belief that his bully was truly empathetic to "in-group" people like his family instead of just being straight-up a terrible person.)