The world have many violent men. These men will provoke their neighbors to fight. We have many issues because of violent people.
The violent person will lead a person to war with them. People wonder why people have bitterness in the soul.
The answer is that we have a sinful desire. We want to do evil and we hate good. The violent person have a love for evil so this person will promote bitterness.
The truth is that everyone can be a violent person. If we are controlled by the sinful nature then we will obey the sinful nature.
We can't control other people but we can kill the sinful nature. We can't read a book and conquer the evil nature.
We need Jesus to overcome the bad nature. We are sinners so we need salvation, so Jesus lived a perfect life and died on the cross and he conquered death. We must believe on the Lord Jesus and repent from our sin then we will have victory.