The unfairness of the world is undisputed. Life is unfair. People do not always achieve what they hoped too. Dictators can rule until death with no punishment. Good people have their lives cut short. The world certainly appears as an unjust place. But interestingly, what gives someone the right to call the world unjust if not God?
Society cannot be an objective reason when the Nazis were society too. Laws only represent societal morals. So perhaps one may opt for a presupposition: “Well, all morals that benefit humanity are good!” Why? How does one prove that morals which benefit humanity are objectively better than those which do not? Science cannot answer morals, as science is only concerned with the “How?” not the “Why?” Even Richard Dawkins, an atheist activist and biologist, admitted “we can all agree that science’s entitlement to advise us on moral values is problematic, to say the least.”  Indeed, entropy is what rules the universe. Hence nature has no morality either. Pitiless indifference is the attitude of nature.
Therefore, subjective morality is abhorrent. If morality is subjective, the disputes over gay marriage, abortion, and anything related to rights is no more significant on a logical level than children bickering over what color is the best. Disputes over morality are pointless if it is subjective.
So morality is objective. Indeed, I would contend everyone believes that, whether they would admit it or not. Anyone with a moral compass will experience deep disgust of the horrors in Holocaust pictures. What the Third Reich administered to Jews was not simply a difference of opinion but genuine, profound evil. Someone may ask now: who or what defines the objective standard for ethics?
I already explained how society, laws, science, and nature cannot define morals in any objective manner. Morals are only known by intelligent entities like us, ergo morals cannot lack an intelligence feature. For morals to be objective, a supreme entity with intelligence must exist to make them objective.
Furthermore, this entity cannot be one that changes. If any individual ever suggested the moral not to murder may change tomorrow, morality becomes another arbitrary invention. Just as the world being spherical today is an unchangeable, objective fact, so the principles that define morality must be unchangeable. So the intelligence which guides the ultimate moral principles must be unchangeable in them as well. Such a supreme, unchangeable, moral entity may finally represent what we label…God.
 Richard Dawkins, The God Delusion, (First Mariner Books, 2008), 206, iBooks.