1.-Census show no 6 million decrease of the jews population in Europe happned after the war.
2.-The gas said used to kill the prissioners (Cyclon B) leaves very specific traces in the places were it is used. No chamber or rooms in german conceptration camps have traces of Cyclon B.
3.-There are no written orders to attack or extreminate the jews from the SS, Hittler or Germany.
4.-There are no 6 million bodies burried in the concentration camps and no ashes that would suggest they where bruned. The water level in Auswitch is 1 meter deep, this means you cannot burrie anything below that depht.
5.-The first written information about the holocaust dates from 1942, before the germans moved the "unwanted" (jews, gays, gipsy, etc.) to the camps.