Origins of Hutu, Tutsi and Twa of neighboring people, it was almost non-existent among Rwandan Tutsi. Presence of the sickle cell trait is evidence of survival in the presence of malaria over many centuries, suggesting differing origins. Regional studies of the ability to digest lactose are also supportive. The ability to digest lactose among adults is widespread only among desert-dwelling nomadic groups that have depended upon milk for millennia. Three quarters of the adult Tutsi of Rwanda and Burundi have a high ability to digest lactose, while only 5% of the adults of the neighboring Shi people of eastern Congo can. Among Hutu, one in three
Rape during the Rwandan genocide to be an act of genocidal rape. The mass rapes were carried out by the Interahamwe militia and members of the Hutu civilian population, both male and females, the Rwandan military, and the Rwandan Presidential Guard. The sexual violence was directed at the national and local levels by political and military leaders in the furtherance of their goal, the destruction of the Tutsi ethnic group. There was extensive use of propaganda through both print and radio to incite violence against women, with both mediums being used to portray Tutsi women as untrustworthy, and as acting against the Hutu majority. The