Hello again and thank you for the additional information. Unfortunately, not all workplace bullying
and harassing sort of behavior is unlawful. The only illegal harassment is "hostile
workplace harassment" which is a legal term of art for a specific type of discriminatory behavior. In other words, unless there is unlawful discrimination
that is involved with "severe and pervasive" harassment, there is no violation of the law. So, unless people are being targeted only because of their race, national origin, gender, age (over 40), disability, religion, pregnancy, or AIDS/hiv status, the harassing behavior is not illegal.
That is not to say, it isn't unprofessional and shouldn't be addressed by management. It just means that if management decides not to do anything about it, there is no legal option after that to end the behavior.
If this is motivated by unlawful discrimination, then you can file a formal complaint with your employer's HR or EO department. Then, if they don't resolve it, you can file a complaint with the EEOC
Please let me know if you need any clarification. I would be glad to assist you further if I can.