Photo by Ian Forsyth / Getty Images The Labour Party’s handling of its former Rochdale by-election candidate Azhar Ali has been a humiliating story of self-sabotage and fatal indecision that will cause the party problems for a long time to come. This story is not over. But – as we will see – none of that is what matters most. Let’s begin with the immediate politics of what happened in Rochdale, a deprived former mill town just north-east of Manchester – and the home, as it happens, of Mrs Gillian Duffy, with whom Gordon Brown had his famous “bigoted woman”...