You are pushing nonsense. You are aware that the Nazi's carefully documented the number of people at each camp they killed in gas chambers each day. The war criminals were indicted by their own written documentation they created.
Point to sources on this. Most were convicted based on the testimony of the prisoners. Some later clearly demonstrated to have been lies but it was too late as the prosecuted were already executed.
Oh.
So they were just having their clothes cleaned. Somehow that kill 6 million of them.
Jews have been pushing the "6 million" number is a fable and it had been repeated many times even before Hitler came to power. Go read the "The Holocaust Dogma of Judaism" by Ben Weintraub, a Jew himself.
Americans used DDT, Germans used Zyklon B. Both are intended for the same purpose.