They were helping people learn a new language because it would help them and give them better opertunties to get work and understand people around them. This was very important for them because without learning a new language they could not speak to the people. I think it's very good they learned a new language
No it did not alter the war on the Allie’s side. Many of the soldiers felt petty and sorrow for the people in the death camps but militarily wise the air force knew of the death camps and could of bombed certain facilities in the death camps to disturb and save lives but they wanted to save there logistics and focus them on the war effort
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Abel brought the firstlings of his flock and Cain brought Fruit of the ground (Genesis 4)