Do you know how many bodies they cremated?
Watch “Shindlers List”
They could not keep the ovens going fast enough at the end of the WW2 to keep up with the bodies from them killing them. They finally decided to kill then and have them to outside the camps and shoot them pilling bodies off a cliff or in land fills… thar where dug already.
They did this in this way as fast as they could knowing that the allied forces where going to win the war pretty much. The idea was to kill as many of them before they made peace or really peace was not an option most extreme believed.
They moved the camps in farther away from the front to keep them going till they no longer could anymore.
So when you see baking cookies in an oven… with Nazi… this is where you see it raining ash in the movie that is people bodies and so on it was so thick that it looked like it was snowing and some was absorbed in the snow so it technically was snowing Jewish people…
This what things are like is you do not understand the whole reality of this going in.