What's funny here could be funny about any company in any industry. Two co-workers work together for years while the rancor and hatred for each other festers. Soon you have a house divided and people have to be on one team or another until someone finally quits and moves on.
It's amusing to see the realization that none of his coworkers like him dawn on Peter Warren. It's like he was totally clueless as to how he is regarded.