Hutu Power a Kinyarwanda word meaning 'cockroach', though the term had also been a self-description by members of the Tutsi Rwanda Patriotic Front. During the attempted negotiations (Arusha Accords) between the Rwandan government and the RPF, radical Hutus began alleging that Habyarimana was being manipulated by Tutsis and non-radical Hutus. They maligned then-Prime Minister Agathe Uwilingiyimana. Following Habyarimana's assassination, an act that at the time people speculated was done by Tutsi extremists, Hutu Power forces mobilized militia, most notably "Interahamwe", and mobs to carry out the mass killings of the Rwandan genocide. The Presidential Guard of the army killed Prime Minister Uwilingiyimana
Hutu of Rwandan national unity, but has been criticized as an attempt at historical revisionism. Still others suggest that the two groups are related but not identical, and that differences between them were exacerbated by Europeans, or by a gradual, natural split, as those who owned cattle became known as Tutsi and those who did not became Hutu. Mahmood Mamdani states that the Belgian colonial power designated people as Tutsi or Hutu on the basis of cattle ownership, physical measurements and church records. There is an ongoing debate as to whether the Hutu and Tutsi are really separate groups or not;