This was a mixture of things.
The increase in population from soldiers and influx of immigrants caused the need for more food to be produced and more jobs to be demanded. So farmers started over producing which led to the Dust Bowl and, eventually, the Great Depression.
While it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton. In fact, the opposite occurred. Cotton growing became so profitable for the planters that it greatly increased their demand for both land and slave labor.
Jews was killed in the Holocaust because Hitler believe that Jews was inferior to the Aryn race.He blamed losing the war on the Jewish population. He also used Jews to promote Nazi ideology. He also to bring pride into his nation
