If 'god' is a metaphysical term, then it cannot be even probable that a god exists. For to say that 'God exists' is to make a metaphysical utterance which cannot be either true or false. And by the same criterion, no sentence which purports to describe the nature of a transcendent god can possess any literal significance.
The world is touched by sacrifice. It does not then discriminate about the merits of a cause. No so God - He is all seeing. He insists on the purity of the cause and on adequate sacrifice thereof.