Why are so many Biracial and Multi-racial American of African descent hate to be called Black?

actually, that's not true at all. I've seen a lot of people that are mixed black/white, hispanic/white, etc. and they pretty much deny their white heritage. look at obama. he considers himself 100% black. Black people to this day still follow the 1 drop rule. If you're biracial and you claim all of your heritage, blacks will despise you for that. Look at the things said about Tiger Woods and Halle Berry. Disgusting.