It may be one thing for freedom of expression to be an object of controversy in Canada -- which is, after all, a somewhat tenuous experiment in democracy and federalism, one whose final shape and outcome may yet remain to be determined -- but it is quite another to see it tormented in Great Britain, the historical anchor of most of the liberties we take for granted. When Britain injures what the rest of regard as British principles, it is a source of particular sorrow. On May 10, a teenager protesting peaceably outside the London headquarters of the Church of...