There is a difference between being A bully, and bullying someone. You may in one sense be a bully to engage in bullying, but robert seems to be saying that we are only bullies, at all times. And that our status of being a bully does not end once we stop bullying someone. We wouldn't be nice to someone else, even if we liked them, because we ARE bullies. It is like the difference between being stupid, and doing something stupid. You can be a genius, and work with men of excellence and accidentally program your lander in feet, and do your calculations in meters.
I mean, if robert was saying that we were mean to fluorescent and happeh, and he wants us to apologize, he'd sort of have an argument. But he isn't saying we were mean, he is saying we can only BE mean, and he believes he must stop us from being able to be mean to people in the future.