You would think humans should be treated humanely at work. However, it is not illegal to be a jerk at work in the United States. Unless the behavior is directly aimed at an EEOC protected class of employee, you are out of luck. The long arm of justice doesn’t reach that far. Abuse on the job at the hands of a jerk, bully or bosshole may be legal, but it certainly cannot be considered ethical.
If your company has a code of conduct policy, look to see if it covers the humane treatment of humans. Does the code consider psychological/emotional abuse of employees as a violation of company policy?
Business leaders must review code of conduct policies and make sure the humane treatment of employees is as important as following proper accounting procedures.