When do you think the nazis realized that a loss was inevitable and how does their behavior reflect the growing chaos in the war and government?

The Nazi's began to realize that the loss was inevitable around the Winter of 1942 or 1943 (some dispute goes within that). They began executing more and more Jew's and POW's more rapidly and trying to hide as much evidence as possible in the event that they were caught.

It taught people how to live a good life, but not what to believe.