He doesnt owe any apologies. If thats how he honestly feels about Brock, fine. I would be insulted if he sugar coated or lied about. And I'm sure lots of guys get in that killer instinct, state of mind. The fact that he expressed it, makes him no worse.
As for Dana & the UFC

really, they have no credibility on matters like this. When Brock was punching "doors off the hinge" at the obsession he had with a Mir rematch, they packaged it to hype the fight. So...