Aizawa’s speech plays for Uraraka and Bakugou. It’s a direct response from the audience booing Bakugou, but it’s also shaming them for doubting Uraraka too.
He’s their teacher. He isn’t going to let them talk smack about his students if it isn’t justified, and he knows them well enough to be able to tell when they’ve worked hard and are acknowledging each other’s strengths.
It’s obvious in the manga too, but it’s so good to see it animated. I’ve just got a lot of feelings okay?