It's funny that you can use the term 'hate' and mean it, to describe how you feel about someone that lives just down the road from you. That person, or group of people, can be roughly the same height, weight and build, have a very similar accent to yours, do a very similar job, like a pint, enjoy a good letch as much as you do and probably, if you were to meet somewhere other than a football match, there's every chance that you would have a good time.
However, they are cheering on the wrong set of pampered millionaires today so you 'hate' them, even though they are doing exactly the same thing as you are, albeit in a different coloured top.
Granted, it's hardly an original idea but let's not let that stop us from stroking our pseudo beards in a pseudo psychological manner.