Obama is a politician. He's better than some, worse than others. But ultimately he is a politician. Anyone who gets in the way of his goal of attaining the White House is going to be expendable on some level. That's not a criticism of Obama by any means. I think all politicians at that level would behave in the same manner.
As far as the substance and manner of what Wright said, the sci-fi writer, producer and screenwriter Steven Barnes gave a cogent analysis of the reasons -intellectual and emotional-why Wright made the points that he did and why Obama may have attended that church. Of course this was written before Obama threw Wright under the bus

but the points Barnes makes are still valid. The thing to keep in mind is that to understand is not to agree.
http://darkush.blogspot.com/2008/03/obamas-reverend-wright.html