If the world promoted the idea of just being proud of who you are while respecting who other people are it would be a lot more peaceful. What becomes dangerous is when people's beliefs turn into what they think is right and wrong.
Humans are judgmental by nature. They ALWAYS have been, always will be. Humans have a psychological necessity to put others around em down, without any reason nor motives whatsoever. If theres anything you could learn from this discussion is that no matter how good, popular, smart, attractive, or whatever you are, there will ALWAYS be someone who's just slightly better than you. That being said, humans need to learn to treat one another equally.