The Cause of Bullying

There is the kind of people who actually seems to have fun by bullying the weak.
Do you know why they feel joy? The answer would be this.
They bully the weak because by doing so, they feel superior and it helps to recover their empty pride.
Humans naturally have the tendency to be more cleaver, powerful and beautiful. Everyone has a pride to oneself. But when we see another person who is more cleaver, powerful or beautiful, we feel lost and it brakes our pride. Then from this point, to regain the pride, some of us chose to refine their selves and try to go higher, but some of us go easier way; show the weak to their disgust and get instant glory. However, the latter's glory never last more than a minute, and never actually level up themselves. Rather, it levels down themselves. The lack of this knowledge, keeps them to continue bullying.
But I'm sure that once they realized this fact, they will stop bullying and start refine themselves.