I try to never question God, make is a cardinal rule, but, sometimes, it happens. We are all human, things will happen to us, like Peter, that will make us go against what every fiber of our being does not want to do. For those not sure of what Peter said, Jesus said that Peter would deny that he was with Jesus as Jesus was being taken in to be judged, scorned, and, whipped, probably, Peter did what we all would do, right? If Peter associated himself with knowing Jesus, Peter thought he would be judged, flogged, scorned, whipped, and, don't forget, killed, 'crucified' on a cross.