Somebody explain this to me.....?

Somebody explain to me ...............Someone hangs a Sarah Palin dummy and its supposed to be a joke. Someone hangs a Barak Obama dummy and everyone goes ballistic because they say it's racial. Why does everyone make such a difference between the two. If its O.K. for one it should be O.K. for the other one and if it's racial for one it should be racial for both. Right?