Regardless of the content, it seems to me that if someone came forward to complain to you, the time and place to deliver the message you had in response was when they came forward with the complaint. Yeah, it's a university, not a daycare, and as such a direct adult dialogue about the issue should be expected. A public letter like this from the university President is appropriate for a broad issue that goes beyond someone raising a personal complaint (which this letter provides no hint of), such as a public controversy directed at the university.

Given the scenario the letter itself lays out, the act of responding by such a public letter is at least as childish, thin-skinned, and inappropriate for a university environment where all participants (especially the administration) are supposed to be adults as the complaint it describes.

And given the specific subject of the complaint and response, it really sounds like the author could do with some of their own reflection on 1 Cor 13:4-5. As well as Gal 6:1 and Lk 6:42.

If you want to instill virtue, it is far more important to exhibit it than it is to lecture about it, though the latter has its place.