T he thing to understand is they really mean it. Of course, politicians often dodge and dissemble, but they also hold beliefs that they hope to enact when in power. Diane Abbott has found herself in trouble for one of those beliefs. On Sunday morning, the Labour MP had a letter published in the Observer in which she suggested that Irish people, Jews and Travellers are not subject to racism, comparing instead their experiences with that of redheads. This was backed up by ahistorical comparisons. She continued: “In pre-civil rights America, Irish people, Jewish people and Travellers were not required...