"These communications do not reflect the company we are and need to be, and they are completely unacceptable"
Boeing appears outraged that employees raised issues in writing, not about the issues themselves. That's reflective of a very, very bad culture. A response like that -- and an internal house cleaning about what gets put in email which will surely follow -- will lead to MORE safety issues. You can't address safety issues if you can't raise them.
This whole response will just make it harder to investigate and understand failures in engineering processes. That's not just the investigations by regulators. You can't have working internal RCAs and similar processes if you have filtered records.
Boeing can't even see this is wrong. This response went to press from an official PR department.