First, I don't think that anyone would mistake Jesse Williams as white. Light-skinned, high yellow, or mixed; but not white.
Second, you can argue that a light-skinned black person who can "pass" can better see the preference they get in comparison to darker skinned black people.
Third, you note that it seems disingenuous for a blue eyed, mixed guy to pick up the flag of black militancy, but it's it's likely specifically because Williams is light skinned and blue eyed that he's militant.
He's trying to show his black bona fides and be accepted as authentically black.
My main problem with the speech was the double standard. Here we are at a celebration of black art and success at the Black Music Awards on Black Entertainment Television. The whole event was a celebration of
blackness, and that's fine. Great even. Seems ridiculous under those circumstances, however, to rail against whiteness as a fabrication
and negative aspect of society.
And the
positive media reception of the speech evidences a further double standard because, assuredly, a white speaker giving a comparable take on "blackness" would be eviscerated by the media.