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Those friends also ran the risk of being severely punished or even executed for concealing and aiding Jews . These results ( Leuchter , Rudolf ) allegedly prove that the materials under examination had not been in contact with cyanide , unlike the wall fragments of delousing buildings in which the revisionists discovered considerable amount of cyanide compounds . The calculation of the Jewish death toll in the Holocaust has been primarily made using demographic means . I certainly would not broach the subject to those under the age of eight or nine , although many schools in this country introduce the subject of tolerance somewhat earlier . The historicity of the Holocaust has been established beyond any doubt over the past 50 years . The Cybrary of the Holocaust has an index to photos on their site . " Since the United States military campaign began in Afghanistan , the unmanned spy plane has gone from a bit player to a starring role in Pentagon planning .