We should discourage toxic behaviour at work (or in any group we are part of, for that matter), so that it can't spread.
Healthy workplalce culture has to be worked at and maintained. I often come across staff who blame the managers, and managers who blame employees. The fact is, everyone is responsible for their own behaviour, and it all conributes to the culture. The thing to remember is that rudeness and lack of consideration are toxic to any relationship, and work is no exception.