>>7 I feel bad for him, too.
Possible spoilers below.
Ishida was just being a kid when he was little. He was mean to her in elementary school. So what? He felt bad about it after she left, but he wouldn't have dwelled on it if they let him be. Everyone else has issues with it because *they never faced their retribution*. They put all the blame on him, so he had to man up and grow up, but they didn't get that chance. They are still so caught up in what they did and are still shoving that guilt deep inside them. They're only hanging out with Nishimiya because they want her to accept them, to be nice to them to try to dissolve that guilt, even though they're still being just as mean to her and Ishida without noticing
It's so realistic but so not fair ;-;
The last chapter made me so happy, though. They all need a damn reality check! Even if it reopens wounds for Ishida and Nishimiya, I hope they finally understand that they did wrong.