It's great to think God is purely all loving but when we think about an omnipotent creator of the universe, sadism must by definition be one of its top traits.  If one was omnipotent there would be no need to use evolution as a way to evolve consciousness, there would be little to learn if you know everything and have infinite intelligence to calculate everything. One of the traps that such a being could fall into though would very simply be boredom. So creating billions of creatures that fight amongst each other can perhaps be proved as one of the foundational divine plans and be based in the enjoyment of watching them fight and kill each other infinitely which can simply be recapped as sadism.  The idea of a hierarchy of values is key because I'm not claiming sadism is God's primary value—reality could easily be engineered to be far more agonizing if pure malice were the objective— but it clearly sits much higher in the divine design hierarchy than conventional spirituality is comfortable admitting.