I think one reason people become bullies is because they know they can't back up their decisions with skill. Linus is brash, but is quite able to work well with people and has the results to prove it.
Most people who adopt bully tactics are simply doing it for tactical reasons to hide their own weaknesses.
The myth of "brilliant jerks" is harmful because it lets any jerk pretend he's doing it because he's brilliant, when chances are he's just afraid of being unmasked as mediocre.
As a corollary, engineering culture should be very open to every member of the team learning and being very open to lessons learned (read: mistakes made) in the process. Bullies often intimidate by criticizing others' decisions, which creates an atmosphere of fear that prevents rational thought and stifles group learning.