Criminal prosecution against Mr Ahmadinejad, the guy that can’t afford a tie, for his Holocaust denial?

a) by Iranian prosecuters: unlikely that the Iranian Penal code prohibits Holocaust Denial, otherwise there will probably be an amnesty law soon, that allows Mr Ahmadinejad to say such things, so: no.

b) prosecution in front of the International Crime Court: no, already not because Iran has not signed the Rome Statute of the International Criminal Court.
http://www.icc-cpi.int/asp/statesparties.html

c) prosecution in Germany, in other words, will German prosecutors arrest him at the airport, if he decides to visit Germany: again no.

Mr Ahmadinejad is not German citizen , nor did he deny the Holocaust on German soil.
The German penal code does not apply for statements he as an Iranian made in Iran.

The German International Crime penal code does not apply either. This code is dealing with war crimes, crimes against humanity and genocide. For such crimes against the international community, there is no diplomatic immunity.
To deny Holocaust is no war crime, nor a crime against humanity ( in the legal sense of the term) and no genocide itself.

The idea that Germany has universal jurisdiction for all crimes world wide is somewhat off-point.
The Israeli lawyer has not understood the International Criminal Law.
But at least people talk about that issue. That is good.
Anyhow: Fak uff, Mr Ahmadinejad, sit-down comedian and would-be second-hand car dealer.