Surprised by Jesse Williams BET Speech

I am surprised by Jesse Williams BET speech because in the last few years all I heard is mixed race people say to let them identify how they seem themselves. The tennis player Madison Keys she is biracial said she does NOT see herself as black and only wants to be seen as Madison. So I am surprised a biracial man Jesse Williams feels this way. Am I the only one who is surprised? I have read about some mixed race people and from what I have heard plenty of them have distanced themselves being called or considered black. I also do not agree with black people who think we need to LUMP mixed race people with the black struggle. Nobody likes Tiger Woods these days I notice and Tiger Woods is darker than Jesse Williams. Yet Tiger Woods has made it clear he is a biracial man of Asian heritage he never considered himself black. And I agree that since Tiger Woods is biracial he can see himself however he wants to identify. BUT I find Jesse Williams interesting the man is clearly mixed race yet so passionate about the black American struggle.