Why Not Very Pretty Human Beings?

Some take cruel stands in life At critical moments For a reason or for anything else... At bad moments, Some people might commit suicide which Is against one's pretty freedom! Some might invade a pretty store To rob a cashier or to assault and To rob pretty customers! Some might shoot innocent people For no clear reasons...! We sometimes don't understand people's Cruel acts towards others, but We do understand that there will be crimes or casualties anytime, Everyone's life is worthy and is very important, so Why don't we behave like pretty human beings in life? ! ______________________________________________________________________