Here is a phrase from https://en.wikipedia.org/wiki/Mobbing
"When it occurs as an emotional abuse in the workplace, such as "ganging up" by co-workers, subordinates or superiors, to force someone out of the workplace through rumor, innuendo, intimidation, humiliation, discrediting, and isolation, it is also referred to as malicious, nonsexual, nonracial / racial, general harassment ".
In my opinion, this is a very disgusting phenomenon and everyone is required to make a decision, depending on the circumstances. Personally, I would leave this institution in any case, since as the saying goes "smoke without fire does not happen" then it was someone's order to be insulted, harassed and humiliated. Usually this is done with weak and defenseless people, whom no one can protect. Strong people will never allow this phenomenon, because without them, work can simply stop and there will be no one to replace. So if you want to avoid mobbing, be strong and irreplaceable.
laws in the vast majority are written in such a way that they allow arbitrary interpretation and it is impossible to prove that you are right. Therefore sometimes it is better not to break into the closed door and quietly leave. You will not prove anything to anyone, but you will lose health and nerves. Try to multiply your opponents by zero and forget about them.