Guardian: There are so many causes. This is forcibly brought home to me outside the Houses of Parliament one day, back in July 2013, where I am trying to locate a "Don't let Burma Become the Next Rwanda" protest. I find it eventually there is a tableau vivant of tombstones and a pair of people dressed as Burma's president Thein Sein and David Cameron with outsize papier-mâché heads but I'm distracted from stories of potential genocide by the activities of Stonewall and the London Gay Chorus who are also...