Hitler had gone through the Allied armies like a knife through butter and figured he would do the same with an even less prepared army.
Don’t forget by this time his brains were being fried by the crank Dr. Morrel. His judgment had turned to outright idiocy.
There was no desperation on Germany’s part and no impending invasion by Stalin. Makes no sense.
Think what you want. I will look into it further. I think the book makes a lot of sense.