sentence: This, in part, contributed to the Rwandan Genocide, which pinned the members of the Tutsi ethnicity or tribe against the members of the Hutu people, although the tension between them was over small differences.
modified: fix grammar: This, in part, contributed to the Rwandan Genocide, which pinned the members of the Tutsi ethnicity or tribe against the members of the Hutu people, although the tension between them isn't over small differences.