You only see so much on camera, it's naive to assume that the 'clean pass' is what Busch bumped him for. Even if it wasn't, a little after race tap to say "I wasn't happy with <insert event>" Is perfectly acceptable in my case.
As for Childress, Busch did the right thing not fighting back. Had he fought back, you'd all slander him for hitting a senior citizen. No matter what he does, you'll say it was wrong, because you're just biased against him. Remember, I'm not even a Kyle fan, and I can still see your blatant biased.
Dale's team screwed him. They told him to conserve fuel and he didn't need to. He was running Brad down, he might not of made it, but he would of been a lot closer. Brad had plenty of gas after the race to burn out and still make it to victory lane, Jr pit 5 laps after him. Absolutely no reason for them to tell Jr to save. Jr's interview skills suck. He seems to hate the camera.