Does that include war? Throughout history, religious leaders have very rarely opposed killing "the enemy". Likewise it's a rare soldier in a time of war who i

Does that include war? Throughout history, religious leaders have very rarely opposed killing "the enemy". Likewise it's a rare soldier in a time of war who is insists on obeying, "Thou shalt not kill". Yet if this is true, then how do you define religiosity if it overlooks willingly acting in contradiction to the most essential laws that a faith and its faithful claim to believe?