I would say that is not a decent boss then. At least, not for that employee.
If a worker is making their colleagues unhappy by being an ass, management should be willing to take appropriate action.
I inherited some workers with bad attitudes when a company I was at merged two teams. On paper it was impossible to fire them, so I wasted so much time trying to get them to fit in. After a year I gave up and went to HR who was like, “oh yeah no problem we’ll let them go”. I didn’t even think that was possible, based on our management training, but it turns out that since their shit attitudes and associated shit performance were well documented it wasn’t a problem. We just paid them severance and off they went.
I was worried about the impact on the other employees, but everyone was happy to see them go.
I talked to one of them months later and he actually thanked me. It turned out that he was unhappy with the job but unable to get motivation to move on. He ended up at Greenpeace for a while; I don’t know how long he stayed there… we were not friends. 😅
The idea is to ensure no future invasions by Russia, not to stop the current one.