http://www.cnn.com/2005/WORLD/meast/12/14/iran.israel/
"Mahmoud Ahmadinejad describes Holocaust as 'myth'"
That seems to suggest that the man doesn't believe that it happened at all. He also goes on to say that Israel should be "wiped off the map." Israel is our ally, and if he wants them obliterated, and we support them, I'd say the country is a possible threat. And are you saying that believing in something that people have believed for thousands of years that could possibly be true (do not let this argument go into religion) is more of a threat than believing not believing in something that is an absolute 100% proven historical fact that everyone with a fully functional brain believes in? the only reason mel gibson is harmless is because he doesn't run a country, and one with nuclear potential at that. imagine if the man was the leader of a country??