Godwin's Law states that

As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one.

The idea is basically that if you continue to insist that your erroneous opinion is correct for long enough, I will eventually complain that you are as evil as Adolf Hitler.

While the following quote about the current Israel-Hizbollah strife from Iranian President Mahmoud Ahmadinejad is actually from an offline discussion (the ceremonial ribbon cutting for a traffic tunnel in Tehran, to be precise), it did cause me to think of Godwin's Law:

The Zionists think that they are victims of Hitler, but they act like Hitler....^[1]

Then I immediately wondered just what exactly a reductio ad Hitlerem argument means when it comes from someone who denies the Holocaust. Another quote from President Ahmadinejad:

There are still questions... maybe in your so-called Holocaust more than six million Jews were massacred (during World War II), so why do you not allow people to undertake new research?^[2]

If the Holocaust did not happen, then Hitler was in fact not evil? Therefore, if Hitler is not evil and if the Zionists are like Hitler, they are therefore not evil, or so says President Ahmadinejad?