The reason for the concept of gas chambers came from the Nuremberg trials. To be condemned on some of the specific genocide/crime against humanity legal frameworks of the time a camp colonel ordering soldiers to shoot lots of people in the head or like the russians did locking lots of people in a closed hangar with a T34 tank running to kill them by carbon monoxide poisoning (by the way a much quicker and cheaper way to murder large amount of people) those were not enough to be considered systematic genocide because they did not implicate an entire state and industrial apparatus to be involved. An easy answer to such type of accusation for high ranking government would simply be "oh well the soldiers running the prison were acting on their we had nothing to do with them rounding up prisoners and killing them. At the contrary, the concept of gas chambers being used means an entire state apparatus was implicated since that means chemical engineering companies being tasked to make poison gas, other companies being tasked with designing the chambers, logistics for building, maintainimg and operating those chambers etc. Basically they needed to show that there was the murder was at an industrial level at the opposite of simply some individuals acting by themselves with tools and equipment designed and constructed for other purposes than killing.

There is a very cool video that is super hard to find that is more than 3 hours interview of camp survivors. It was part of a documentary Spielberg did but basically those are the interviews and statement he obviously did not include in his documentary about survivors. There stories are litteraly the opposite of what Ive been taught my whole life. They share how obviously the conditions were not the best, especially towards the end of the war when the logistics of supplies in the reich were crumbling. But what stroke the most was how despite this horrible ordeal the survivors had this nostalgic light in their eyes. They tell about the camp having a drama and opera club, a room with piano and music they could use, a room was dedicated for religious services, they had a soccer team and even had tournaments between the german camp guard soccer team and the prisoners team (we are even showed pictures of this), they had a library and sometimes movies were available and both guards and prisoners assembled to watch a projection... Like they say it wasnt a summer camp, but it wasnt the image I was taught. Towards the secomd half of the war when the german machine started failing, they do say how conditions and lack of food got worse and worse, and it even affected the guards. Thats when malnutrition and typhoid fevers started killing hundreds, thats when germans guards started killing the sick etc... Its a horrible time in history and shows the terrifying side of totalitarianism, but I do not believe the big bad boogeyman it was described as anymore. Its just sad that once again its the simple innocent jewish, polish and other families and people that took the sword instead of the 1930's equivalent of globalists anti-christian bankers and crooks who obviously knew what was coming and left the burning ship selfishly. And what do they do once to the safety of other places? Start the slow process of burning them once again to profit from the smoke and flames. They just know that most people wait until a critical mass of others light the fuse to join an uprising but since nobody is brave enough to sacrifice themselves by starting the uprising well we all wait doing nothing waiting for someone else to take the fall, me included... We need a Joan of Arc or the Boston Patriots of the Freedom Trail equivalent..