pretty simple actually. Ole Miss comes from the thinking, "We are Ole Miss, we have tradition, we know we are better, if someone beat us, it's something we did" and MSU fans come from the thinking, "We are Mississippi State, everybody's out to get us, they just think they are better, they really aren't". Both schools have about the same number of fans, same amounts of money, etc. Just a few different traditions, different colors and different signature schooling programs. ****, we all come from the same cities and towns.
This line above applies when we are equal. When one or the other is better than the other one, the lesser one spews venom at an alarming rate, usually played off of the above written stereotypes and lines of thinking. State has an inferiority complex and OM has a superiority complex, both equally effing stupid.