Aaaaanyway.........
Also...and this isn't meant to downplay anything...we don't know if Dorner's initial complaints were actually sound. We all agree that racism and abuse are bad, but we also know that they can be misinterpreted or twisted at times. Not to say that it didn't happen like he said it did, but as others have mentioned...the actions that he's taking don't exactly point to a stable mind, so it can't help but call into question anything that he claims instigated it morally.
Frankly, it could end up being even worse than one says, but this is the wrong way to deal with it, and certainly to draw attention to it, because it makes him and anything he says all the more dismissible as the ramblings of a disturbed mind. If there's a 'cause' to it, this does more to hurt it than anything.