Frankly, this seems like a measured response to a fairly standard complaint. Perhaps the only part of it that grates me is the public and "outraged" nature of the complaint. Without knowing much more about Carl's actual work, I suppose the outstanding question is, if the reasons above are true then how did he get the offer in the first place?
[0] https://www.st-edmunds.cam.ac.uk/sites/www.st-edmunds.cam.ac...