Why is there such a lack of physical evidence for the gassing of people at Auschwitz?

No one was gassed at Auschwitz. In fact no one was ever gassed in any cc. The pictures everyone sees of dead bodies and staving people where caused by a typhoid epidemic. The zyclon B canisters are there yes , but they where used for delousing. Ever wondered why the gas chamber door opens inward and not outward? Because it wasn't a gas chamber at all. The chimney next to the so called crematorium is not even attached and was proven to be built AFTER the war. Another fact most of the people who have answered is that ( if they care to look and they wont because they have closed minds and have been duped beond belief) in Auschwitz camp the inmates had a theatre a swimming pool they had there own currency there was even a brothel! Did the guards send the inmates to the brothel for a ( quickie ) before gassing them? Then we have the dreaded tattoos. Why would somone tattoo an inmate then gas them , the reason they where tattooed was to prevent escape. I,m not even going to go into the ridiculous pathetic nonsense of mass fires and so on just do the maths I think its something like 46 years to burn 6000000 people in an antiquated crematorium like the ones in the pictures . And before people accuse me of racism I,m not I believed all the lies just like most until I did some research. But hey I guess this answer will be deleted anyway. Have a good day and don't be so gullible Not the asker