The race riots driven by the #BlackLivesMatter movement would never have gotten where it is today without Obama's words granting them political legitimacy. His words made the media and establishment opinion embrace looters and vandals as "activists." Now we also have the #BlackonCampus movement to serve as an "Obama youth" organization, spreading mayhem at universities where they probably have no business being if it weren't for affirmative action.
Yes. He has indeed. He’s poked Americans repeatedly in the chest to provoke and divide (diminish and defeat).