The fundamental flaw of the Judeo-Christian belief system is that humans are imperfect and deserving of death (JW) or eternal punishment (the rest of Christianity). Then comes pride. Christianity teaches there is nothing we can do to earn God's grace. Christians nod in agreeance and say, "That's right!" However, those same people cannot accept God's grace is just freely given. They have to subject themselves to ridiculous rules and beat up on themselves because pride won't let them accept that grace otherwise. They're pride won't let them give value to something if they have not earned it.
Then we have those who believe the existence of pain, suffering, and death are proof that a god does not exist. Further, if a god does exist this god could not be loving while simultaneously allowing pain, suffering, and death to exist. For a god of love to exist that god must be the universal butler whose job it is to serve man and come to mankind's rescue.
Pain is inevitable. Pain does not happen to us. Pain happens. Suffering is what we chose to do with that pain. Death is part of the experience of life. To cheat death is to cheat ourselves out of the complete experience of living. Death gives life value.
People spend their whole lives searching for the answer to the question: Is there a god? The keep looking out in the world and out in the universe to find the answer. They come up with no answers. That's because they look outward instead of looking inward.