If “god does not change”, then god of the past is also god of the present. If he can order the killing of men, women, children, babies, cattle, sheep, camels and donkeys as read/seen below (1 Samuel 15), then I don’t know but what do you think about the present killings of people by Isis, Boko-haram and the others just because they see them as unbelievers? Were they instructed by same god?
