Yes the "us" and "them" feeling is hard to handle, it's the same in every kind of organization(sports, hacker group etc) where some people have been around for quite long and invested much time in different things even if the formal roles are different
I find myself reminded of a claim that a issue with the early leadership of Jobs at Apple was that he was instigating competition between project teams. In particular surrounding Macintosh and Lisa. While the Apple II (with Woz) was off in a corner, keeping the ship afloat.
