There are 3 staff members at my work (all late 40s/early 50s) who seem to have developed a nasty, bitchy little clique over the past year or so. They are openly sassy and critical towards people they don't like in meetings or when working with them. They'll take any opportunity to make a comment to put someone down. And the only topic of conversation is being unkind and mocking about other staff.
How would you deal with people like this in the workplace? Aibu to raise it as a concern with someone? Or do I just stick my head in the sand and completely avoid this lot the best I can? It's a large civil service department for context, and considering the nature of the work we do, I'm shocked these people can be so nasty.
Side question, why are people so nasty?