Raphaël Glucksmann, the MEP who this week decisively won the primary to choose a centre-left candidate for France’s 2027 presidential election, has worked more than most politicians on the issue of genocide.In his former life as a documentary maker he made Kill Them All!, a film that argued France held some blame for the 1994 genocide of Tutsis in Rwanda.He became a leading voice against the persecution of the Uyghur Muslim minority in China after entering politics and winning election to the European Parliament in 2019. His efforts to organise boycotts against goods made with forced Uyghur labour saw him...