This is not how "Holocaust" is defined. The Holocaust in this context is a deliberate, planned and based on work-sharing extermination of Jews using industrial methods. Almost all HC deniers believe that only a few Jews were tortured and killed by criminals against the orders of the Nazi regime. This is exactly what makes them Holocaust deniers. They reject the big picture. There weren't "so many," but apparently they were capable people who were useful to the Nazis. After the end of WW2, some old Nazis were reinstated in important positions to get Germany running again. For the same reason. One couldn't easily get a replacement.