Quoted from the Leuchter report:

“This purpose does not include a determination of any numbers of persons who died or were killed by means other than gassing or as to whether an actual Holocaust occurred. It, further, is not the intent of this author to redefine the Holocaust in historical terms, but simply to supply scientific evidence and information obtained at the actual sites and to render an opinion based on all available scientific, engineering and quantitative data as to the purpose and usages of the alleged execution gas chambers and crematory facilities at the investigated locations.”

Making use of scientific terminology, the authors deny the crime of the century, claiming to have discovered proof on-site at the sites of the gas chambers in various concentration camps. This resembles the arguments of the gain-of-function-deniers who claim to have on-site evidence from WIV that no weapons could have been used. Zyclone B had industrial uses for delousing, including its use on the US-Mexican border, and therefore no one can assume that Zyclone B had another purpose, the gas poisoning of human beings to systematically murder millions. The chimera viruses produced at WIV had a research purpose, to predict the evolution of animal viruses into human viruses. This could not have prevented the military from buying the engineered viruses and using them like the Nazis used Zyclone B.