In February we reported that anti-Semitic hate crimes in the UK had hit a record high, prompting prayers for more visible and frequent prosecutions for such incidents. The Jewish community was targeted almost four times a day last year, which also saw the highest tally of incidents since data gathering began. Three-quarters of all anti-Semitic incidents were in London and Manchester, where most Jewish communities live. Hatred is rising, and Jewish people are suffering as a result. This should concern everybody because it shows anger and division, threatening all society. In 2015 the international community agreed on a definition of anti-Semitism. The UK’s Labour party has not signed up to it, saying its own code of conduct already covers the definition. On 23 July Labour MPs and peers backed the international definition. Jeremy Corbyn disagrees.