Very sad. Imagine what goes on behind closed doors if that guy is comfortable to act like that in public. Just really, really sad.
Twitter comments on this are full of the usual keyboard Schwarzenegger's asking why the people stood around didn’t get involved. I’ve actually encountered a situation like this before where I stepped in to stop a guy hitting a woman in a club, and what then happened is that the woman I was trying to stop being hurt then started throwing punches at me and telling me to get off her man!!
This is why it’s better to not get involved in most situations, even if you think you’re physically capable, ensure that you and your loved ones are safe in the first instance and then get help from security/police.
It only takes one punch to be killed.