It's tongue-in-cheek. I think it's dumb that criticizing hubris in the manner seen in this comment thread is seen as hateful just because hubris is part of someone's culture.
Well, I'm Israeli, and hubris is not part of my personal culture, but it is prevalent in Israel. IMHO it's a real problem for Israel because people here tend to be euphoric and unaware of the consequences of our decisions.
On the other hand, it does make us more daring and in today's world it is a great way to "succeed"
Yes, until you piss off too many people around you with your excessive confidence- which includes a sense of superiority and the feeling of being immune from the consequences of evil or hostile actions.
And if you made everybody around you an enemy rather than a friend, sooner or later you'll pay the consequences.