A friend, a Cambridge professor, passing my old college last week, was startled to encounter a young lady standing outside shouting something and carrying a placard exhorting Mathew [sic] Parris to [expletive deleted] off. He wondered if I knew what this was all about. I don’t, but suppose it relates to my Times column arguing (about asylum seekers) that we do not have an equal obligation to all, but rather concentric circles of obligation at the centre of which we stand, the first circle being to self and family, the next to close friends, neighbours and community, then to nation...