Old white guys can be a funny bunch, can't they? The same anti-same-sex marriage, anti-affirmative action cadre can flower into the biggest supporters of 'equality' the minute they get a whiff of minority empowerment.
If faux liberal white guys want to support and defend Obama, by all means please do so. But I would suggest they try to limit that support to matters of policy and not perspectives on race.
It's not that white guys shouldn't be allowed to engage in discussions on race in America. But there's nothing more exhausting than white male liberals' dogmatisms on race that were clearly formed during a conversation they had with that one black guy they met back in college.