It was exactly a year ago that a 22-year-old white man went into the Emanuel African Methodist Episcopal Church in Charleston, S.C., and murdered nine people.

I don’t know, as I write these words, whether you, the reader, are black or white, conservative or liberal, British or American. But I reckon I’m on pretty safe ground in guessing your reaction when you heard of that abomination. Uncomplicated revulsion, right?