The Rabbi shows his total ignorance . I pity the poor men that he gave that advice to, should they be foolish enough to listen to his empty words. Showing mercy for any soldier is an essential part of his fighting skill. For unless the enemy knows that he will be treated in accordance with the rules of war the task ahead is made that much more difficult. Prisoners cannot be taken and neither will they surrender. That same soldier who showed no mercy cannot expect any himself when rendered helpess before the enemy.
Protests in southern Syrian city after Druze cleric's death (AP)
from the article: IDF Chief Rabbi: Troops who show mercy to enemy will be 'damned'