In what context would it be OK for a CEO to send ENTHUSIASTICALLY YELLING e-mails to employees telling them they are SLOW DUMB DOLPHINS and to STOP EMBARRASSING

In what context would it be OK for a CEO to send ENTHUSIASTICALLY YELLING e-mails to employees telling them they are SLOW DUMB DOLPHINS and to STOP EMBARRASSING ME STOP IT STOP IT RIGHT NOW...? Also how would our knowing more about the CEO/employee relationship here improve our perception? The most "positive" thing I can think of is, the employees are so used to it they would tell us something like "oh, that's just CEO, he communicates really passionately". That's not actually positive, though. It's Stockholm Syndrome. [1] [1] - https://en.wikipedia.org/wiki/Stockholm_syndrome https://en.wikipedia.org/wiki/Stockholm_syndrome