Since the Germans developed sarin gas, which is incredibly efficient and small amounts are required, why would they use a pesticide in granular form (Zyklon-B) which was bulky in comparison and takes hours to fully release it's load?
As with most other things about the 'holcau$t' as alleged, it doesn't make sense.
http://news.yahoo.com/news?tmpl=story&u ... aq_sarin_4
In 1995, Japan's Aum Shinrikyo cult unleashed sarin gas in Tokyo's subways, killing 12 people and sickening thousands. In February of this year, Japanese courts convicted the cult's former leader, Shoko Asahara, and sentence him to be executed.
Developed in the mid-1930s by Nazi scientists, a single drop of sarin can cause quick, agonizing choking death. There are no known instances of the Nazis actually using the gas.
Nerve gases work by inhibiting key enzymes in the nervous system, blocking their transmission. Small exposures can be treated with antidotes, if administered quickly.