I had a Rwandan student who told me that during the genocide of 1994 husbands in cross-community marriages would kill their wives (and vice-versa). It is beyond imagining. This was not some bureaucratically organised, impersonal, rational process like the Holocaust of the Second World War. This was a genuinely popular genocide.
What most of us cannot understand is how it came about that hundreds of thousands of people who had never killed before took part in the mass slaughter. It is…