James 4:1 Where do wars and fights come from among you? Do they not come from your desires for pleasure that war in your members?
Where there is fighting, sin is present.
I’m not talking about defending yourself when attacked or a sporting event like boxing or wrestling, but on the level of war, riots, mass violence, and personal attacks.
Why was there a World War II?
Because someone derived pleasure from conquering others.
Someone derived pleasure from the destruction of others.
Someone wanted something that did not belong to them.
The same reasons exist when someone attacks you or you attack others.
For where envy and self-seeking exist, confusion and every evil thing are there. James 3:16
Fighting has the sinfulness of pride at its root.