Priests Were Not to be Pacifists but they were to exhort and encourage those who were to go out against the enemy, to be brave and to carry the day.

Deuteronomy 20.1. “When you go out to battle against your enemies and see horses and chariots, a people more numerous than you, do not be in awe of them! For the LORD* your God is with you, Who brought you up out of the land of Egypt. 2. And it will be, when you have come near to the battle, the Priest will approach and speak to the people 3. and will say to them, ‘Listen! Obey! O Israel, you approach this day to battle against your enemies: Do not be faint hearted! Do not be in awe! Do not tremble! Do not be terrified before them! 4. The LORD* your God is He Who goes with you, to fight for you against your enemies, to save you.’