I watched the series on Arusha Rwanda Accord..in part 3 at the end Owana gives commentary on how any time Museveni or anyone would remind Juvénal Habyarimana that the Rwandan refugees were eager to return home. He would pause. If there was drinking water he would take the glass pour water until there was an over flow that would spatter all over to the floor. His point was that Rwanda was full and he couldn't take anymore people
So I got the feeling that genocide to hutus was a populatioj control measure..i think the guys explained that rwanda has 600 people per square kilometer..