Here we go, Steelers, here we go!

So I thought this was cute:

A Cleveland family of football fans head out one Saturday to do their Christmas shopping. While in the sports store, the sone picks up a Pittsburgh Steeler jersey and says to his older sister,
"I've decided to become a Steeler fan and I would like this for Christmas."

His big sister is outraged by this and promptly whacks him 'round the head and says,
"Go talk with Mom."

Off goes the little lad with the Pittsburgh Steeler jersey in hand and finds his mother.
"Mom?"
"Yes, son?"
"I've decided I'm going to be a Pittsburgh Steeler fan, and I would like this jersey for Christmas."

The mother too is outraged, promptly whacks him 'round the head and says,
"Go see your father."

Off he goes with the Pittsburgh Steeler jersey in hand and finds his father.
"Dad?"
"Yes, son?"
"I've decided I'm going to be a Pittsburgh Steeler fan, and I would like this jersey for Christmas."

The father is so outraged that he, too, whacks his son 'round the head and says "No son of mine is EVER going to be seen in THAT!"

About half an hour later they are all back in the car heading towards home. The father turns to the son and says,
"Son, I hope you've learned something today."

The son says, "Yes, Dad, I have."
"Good, son. What is it?"

The son replied, "I have only been a Pittsburgh Steeler fan for an hour and I already hate you Cleveland bastards."