The definition of “Tropical Nazism” is given by the scholar in African studies Jean-Pierre Chrétien on “Liberation” in April 1994, regarding the genocide started a few weeks earlier which brought the Hutus of Rwanda to kill more than 800.000 Tutsis and moderate Hutus in about three months. This expression, more than reminding an inaccurate similarity with the Holocaust that had very different features, condemned the thoughtless action of Western Countries in their analysis of what was going on in Rwanda, that is the old idea of traditional tribal fights, without understanding that it was something new: a genocide. The paper aims to reconstruct the features of the Rwandan genocide in comparison with the Holocaust, to stress the novelty in the jurisprudence and international right following the Rwandan genocide with the creation of the ad hoc International Criminal Tribunal for Rwanda (ICTR) in Arusha, Tanzania – which among its goals brought to the first sentence for genocide (in the Akayesu trial, where the judges face for the first time the interpretation of the definition of genocide according to the 1948 Convention). It will also underline the gravity of mass rapes and their new meaning in Rwanda as well as in the Balkans in the Nineties in comparison with previous genocide and conflicts, becoming from mean of revenge on an enemy seen as inferior a real war weapon aimed to attack women and through them their belonging community. In the mass rapes in Rwanda there is the explicit willingness of targeting the Tutsi women and with them the whole Tutsi population, through such an unequivocal policy that the Minister of Family and Female Promotion Pauline Nyiramasuhuko planned the systematic violation of the Tutsi women releasing from the prisons the persons affected by AIDS so that they contaminated the victims and their relatives.