My remark wasn't regarding public poo-flinging from employees to Elon, I agree, it is unprofessional and I would expect more. However, I would also expect my CEO to also not be a poo-flinging memester, too.
He sent an email out asking for employee loyalty (to him?). That is behaviour that is in line with someone who wants only sycophants. Perhaps you read it differently to me.
I don't think that means he necessarily wants sycophants.
I don't think it's unreasonable to expect respectful communication from your employees, and to not be publicly contradicted.
We're in a strange phase in the U.S. where this is a lesson that many young people are learning the hard way.