> Nonviolent folks can be negotiated with. Its not permitted to negotiate with criminals/terrorists.

This is definitely true to some extent, especially when non-violence has been used in the more distant past.

But in recent history, the non-violent approach creates a sympathy for the cause among impartial 3rd parties, who find violence against non-combatants to be unpalatable. You can turn the world against an enemy by putting the enemy's asymmetric use of force on display. This doesn't work in a lower empathy society.