The point is that large portions of Africa (and elsewhere) are being rendered uninhabitable as we speak by man made climate change. Or I should say white corporate made climate change cos it's not like "man" in general is responsible for it. The problem was created by the rich white people but black poor people are paying the price.
Re Rwanda, I hardly think the Tutsi "chose" the side of the Belgians. "Chose"? The Belgians understood the divide and conquer game and they chose the Tutsi to be slightly more favoured. Just as the British in Nigeria slightly favoured the so-called more 'civilized' Muslim Hausa over the people in the south who followed traditional religions/cultures.
As far as I know the genocide in Rwanda was the result of the divide-and-conquer ingredients left to bake by the Belgians, along with the fact that it is an artificially created country that shoved two groups with different lifestyles and territories together into a tiny space (one of the most overpopulated countries on the planet). I doubt it had much to do with some natural conflict between cattle herding cultures and non-cattle-herding cultures, or with bride kidnapping.
Re cattle herding cultures, what are you getting at? Are you trying to say that cattle herders are by their nature all a bunch of rapists? Maybe I'm misreading you there.