He didn't exactly "react" though. He was asked about it in an interview so obviously had to say something to clear the air. He's said or done nothing since Punk took that shot at him. I can understand where Punk's coming from but he needs to understand that not everyone has to go public with something that's bit of a burning topic. I know Styles can get the message across to a large number of people if he comes out in support of the protests but, really, it's his choice. I'd understand if he actually made some disparaging comments on the matter but he didn't.
I respect Punk for his stand but don't agree with him going after AJ because, let's face it, even if Styles does say something, it's going to accomplish absolutely nothing. It goes way deeper than any tweet or show of support can resolve.