There are shitty weasels in every company.
There is always at least one such person, and even when his business responsibilities are such that he decides, it is a crappy situation.
I was a witness when one such colleague got into a verbal conflict with our colleague. And then he showed that he is a real shitty, egotistical, jealous weasel. Female colleagues are an even more vulnerable category when they are the target of such shitty weazels, while we, the male part of the collective, deal with them more easily...
The work place brings a whole lot of people who may not normally get along into one place where they have to get along and, of course, it doesn't always work out well. The presence of shit weasels doesn't help matters.