Because it caused people to starve and soon cause an uproar in protests, strikes, and soon, war.
Some people were forced to starve to death, eat rats off the streets, and more.
Soviet Union had stretched from Europe to the Pacific Ocean and conquering all of it would take time and effort, and the Nazis had to face the Soviets and nature at the same time.
It was a religious movement that happened in 16th century within western Christianity.
