Why do Wiesel and his father leave Buna? How do they respond to the circumstances of the forced march?

While in the infirmary, Elie is told the Russian Army is close to liberating the camp. To his defense, many such rumors had come and gone unfounded during his time at multiple camps. Should Elie remain in Buna and arrange for his father to pose as a patient or a nurse in the infirmary in the hope of freedom when the Russians arrive, or should he go on the march of evacuation with so many others? In a way it is a test of his faith: Will he wait and trust God to finally deliver him from his hell on Earth. Elie cannot put his trust in God to save him. He is driven by his instinct to survive and by his hatred for the atrocities he’s experienced and witnessed. He has more faith in Hitler’s faithfulness to keep his promise of annihilating all the Jews than he does in the faithfulness of God’s promises to protect and deliver His people.