@Green Witch,
God always has a reason for what He does and for what He allows, though people may not always understand those reasons. Biblical accounts indicate human siffering happens when there is a clash b/t good and evil. Job's suffering was caused by Satan as a means to test and try him. Though people plead with God to end their suffering, the psalmist said God may not stop suffering when people ask. God is aware of suffering, the psalmist declared, but sometimes He allowes it to happen to make people stronger, stouthearted, or bold in their faith.
The bible also says Gos is powerful enough to wipe out all human sufferings in one word, but He allows suffering b/c He loves people. that may sound strange, but if God were to destroy those who do wicked, wrong things to other people, He would have to destroy everyone because the Bible says everyone has committed some kind of wrongdoing, some kind of sin.
But God loves people. He does not want folks to die without having a relationship with Him. so God "proves His own love for us in that while we were still sinners Christ died for us" (Romans 5:8) God not only lets humanitly live, He gives folks a way to end human suffering by offering everyone a changed heart. In God's hands human suffering can serve a posititive purpose. Suffering can be a reminder of humanity's need for Got's touch on every heart.
And the point about someone's head being cut off. If I am living my life for the Lord and I get killed, I would not want to return to this earth, because I would already be in heaven with my Father.
Also, the Lord is not the one that makes people suffer.. we all should have to endure the pain of the cross and die the most painful dead (being crucified), however, God sent His only Son to endure that pain for us so that we would never have to!