Sadly, whites are rarely open to what black and brown folks have to say regarding their ongoing experiences with racist mistreatment. And we are especially reluctant to discuss what that mistreatment means for us as whites: namely that we end up with more and better opportunities as the flipside of discrimination.
I don't think the job of the antiracist is to convert the far-out heathen racist, or give them their 'come to Jesus' moment, as it's called. They'll either have those or they won't, and usually, when they have them, it's not because of something someone said per se; it's because of some life crisis that makes them rethink.
Sadly, if President Obama is willing to ignore the pain of race-based discrimination and injustice so as to make whites comfortable - and this, after he has already been elected and the campaign is long over - then the likelihood he will ever speak the truth about these matters, let alone address them, shrinks to nearly zero.