@djsumdog "Wooden doors" is a reference to one of tne reasons we know that the holocaust didn't happen. This is because the jews claim that the Nazis used delousing rooms to gas jews to death using Zyklon-B, a delousing agent.
However, to reach enough of a concentration in the air that one could suffocate on Zyklon-B, the walls would be stained a color called "Prussian Blue" (which they were not), the light fixtures would need to be insulated so that they did not cause fire/explosion (which they were not), and finally the room would have to be hermetically sealed, which was not possible since the doors were made of wood
See picrel