The campaign was so divisive that now Maccabi have said they won’t sell any tickets for away fans even if the ban was lifted. Birmingham’s experience should have made its authorities more alert to the dangers of that kind of mobilisation. The city has produced some of the country’s most notorious terrorists. Moinal Abedin, Britain’s first al-Qaeda-inspired militant, was convicted in 2002 for plotting to manufacture explosives. A few years later, Parviz Khan led an al-Qaeda-linked cell that plotted to kidnap and behead a British soldier. Just last week three men in the Ward End, Saltley and Alum Rock areas...