Your question goes to the heart of why God allows suffering. This is the hardest question we have to grapple with, but the more one comes to know God, the easier it is to grasp the answer. I am by no means an expert, but here are a few thoughts:
Even though we don’t want to hear it, death is not the worst thing that can happen to us. Being separated from God for eternity is the worst thing.
We need to remember that death comes to all of us, some much sooner than others, and none of us are guaranteed a life without suffering. Life isn’t about being happy here…life is about loving God and being loved by Him, and living our lives for His glory.
God allows sinful man free will, and unfortunately, that includes the ability to commit great acts of violence and wickedness. We also have the ability to do great things for God, and small acts for God that no one else notices.
We’re not here on earth to question God, but we can trust Him that He alone can bring good out of darkness. He alone knows how many people in that Nazi camp turned their lives over to Him and were saved, instead of living free lives and ignoring Him. He alone knows what good He was able to bring out of that horrible time.
Instead of focusing on the seemingly tragic and pointless suffering, we should instead focus on Jesus and how He suffered for us. We’re called to imitate Him in our sufferings. Many, many people who died during the Holocaust were heroic martyrs…dying to save others, dying because they refused to deny God. We can look to them for examples of heroic courage.
Have you read Corrie Ten Boom’s book The Hiding Place? God showed the supernatural power of His forgiveness through her. She was able to forgive the Nazis who had tortured her and caused the death of her sister. Read it…I think it will help.
Draw closer to God…knowing Him intimately is the only answer to grief, because He Himself is the only Answer when our hearts are in agony. Jesus is enough, and one day when we’re with Him we’ll understand why things had to be this way here on earth. We can trust Him that we are in the palm of His hand, and nothing happens except for our good.