Who cares what the cause of the behavior is? It is unacceptable.

That should be enough. No need to even try to explain of empathize with it.

But it is telling that the richest man in the history of mankind acts like this. People should see that wealth does not equate to strength, intelligence, good politics, etc. But instead people see wealth as a way to get away with anything they want, even if it is completely embarrassing stuff that no one with self respect would even think about.