Well, with caucasians, you can't expect someone living on the outside of the experience to know each road you've been down, to understand how complex your paths have been, nor to portray your life's story as if it were their own. I don't see too many black people trying to tell the world about the Irish experience, but they're always trying to tell us about ourselves.
And it would seem that once hollywood sets a trend for black people, everyone better be on board or you're just not going to get attention.