Elvis lives on and SpongeBob shows his underpants

1) Last week a contractor claimed the head coach for the Oklahoma State University football team fired him because he showed up to work wearing a rival's t-shirt (the University of Oklahoma). Are there any sports teams that you strongly oppose just because they're rivals of your favorite teams?
As an Oklahoman, I grew up believing that you had to pick sides between OSU and OU and no matter what