The truth is that cowardice itself is violence of a subtle type and therefore dangerous and far more difficult to eradicate than the habit of physical violence.
There is nothing wrong with violence in itself. In any particular case, whether violence is good or bad depends on how it is used and the purpose for which it is used.
Humankind has to get out of violence only through non-violence. Hatred can be overcome only by love. Counter - hatred only increases the surface as well as the depth of hatred.