Jews, and other Holocaust promoters, may lie, but chemical tests do not lie. The only three chemical tests ever done on the facilities at the Auschwitz concentration camp in Poland, claimed by many to have served as deadly Nazi gas chambers during WWII, have all unequivocally shown an absence of hydrogen cyanide residual compound levels in the material of those facilities, which, scientifically, would have to currently exist in order to support the allegations that such facilities were ever used for gassings - a claim made ad nauseum by a group of people who call themselves "Holocaust survivors." However, none of these so-called "Holocaust survivors" was ever subjected to cross-examination when they testified at the Nuremberg "war crimes" trials immediately after WWII, nor in any subsequent so-called "war crimes" trials, in which they testified to similar allegations against the Nazis. Additionally, no so-called "Holocaust survivor" has ever successfully passed a lie detector test regarding their allegations of mass murder against the Nazis.
This video summarizes the results of chemical testing done at Auschwitz in 1988 (and introduced into court during the trial of Ernst Zundel in Canada that same year) by American gas execution equipment designer, constructor, installer, and troubleshooter, Fred Leuchter, who testified as an expert witness at the Zundel trial.