Christians' biggest problem is explaining how an all-loving God can allow so much suffering. But they make up excuses by saying things like, "God's morality is different from ours. Maybe what seems like suffering to us is necessary to God's larger plan that we don't know anything about." But that's just a cop out, a conceit, because they can't explain it within the context of their Christian faith without resorting to such excuse writing.
In Genesis it says that God made us in His image. Evangelicals and Creationists always assume it means his bodily image. But John 4:24 says, "God is spirit, and his worshipers must worship in the Spirit and in truth." That means Christians should always view God not as a human but as a spirit, and since we are created in his spiritual image, we have the exact same morality as God. So either God has acted immorally when he committed genocide, misogyny, rape, and slavery. Or all that is moral and we should be allowed to do it, too. If the latter, then why would anyone want to have anything to do with God, because humans have obviously evolved a higher sense of morality. If the former, it means God is fallible and susceptible to the same weaknesses as humans.