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
Rwandan genocide magazine called "Kangura", which became popular throughout the country. This published anti-Tutsi propaganda, including the Hutu Ten Commandments, an explicit set of racist guidelines, including labelling Hutu who married Tutsi as "traitors". In 1992, the hardliners created the Coalition for the Defence of the Republic (CDR) party, which was linked to the ruling party but more right wing, and promoted an agenda critical of the president's alleged "softness" with the RPF. Following the 1992 ceasefire agreement, a number of the extremists in the Rwandan government and army began actively plotting against the president, worried about the possibility of Tutsi being