Why are some groups of humans toxic?

Linux people are just humans too. same ratio of assholes to catgirls as the general population. (mostly) if you have an ass in a group, the catgirls tend to leave and other asses aggregate. Toxic group is born. Just happens, and as long as you don’t depend on that group, just avoid them. if you do depend on the toxic group, ignore as much as possible, and start looking for a way out.