That's a damn shame. But every fan-base has it's share of morons.
Heck, right here in Houston we've seen a black QB called an N-bomb at home games, and more recent, a QB's wife had beer poured on her. Fast forward to just last year and some doofuses decided to throw physical threats toward Jacoby Jones.
Some people are just shallow-thinking mouth-breathers that live too much of their lives vicariously through their sports teams.