Arsenal are liaising with the police over antisemitic posts sent in the WhatsApp group of the Ashburton Army, a prominent fan organisation to which the club give assistance. The messages on which a date is visible were sent in 2019 and are largely Holocaust-focused, though they also take in Israel-Palestine conspiracy theories, Jewish practice related to circumcision and Tottenham’s reputation as a Jewish club. The sentiments are communicated in words, songs, memes and cartoons. The Guardian has seen dozens of harrowing messages, some targeting all Jews and others directed at one Jewish supporter who was part of the group but...