I will raed that book of Osho. Thanx for the reference.
The Pandavas were to kill Kauravas only if necessary (i.e. if they didnot surrender or flee).(See rules agreed between two sides in Mahabharata). But even that (which was duty of a soldier) has to be done without hatred. One should not for example jump up in joy after killing the enemy. Nor u should mutilate his body etc. which our friendly neighbours love to do .
Another thing if enemy surrenders, he is not to be killed . But adherents of some other religion killed surrendered jews. Find out more about this.