A man who cannot control his temper is not very likely to control his passions, and no matter what his pretensions in religion, he moves in daily life very close to the animal plane.
Our world is one of terrible contradictions. Plenty of food, but one billion people go hungry. Lavish lifestyles for a few, but poverty for too many others. Huge advances in medicine while mothers die every day in childbirth, and children die every day from drinking dirty water. Billions spent on weapons to kill people instead of keeping them safe.