Raging street battles that marred Germany’s G20 summit have sparked a political fight over how Hamburg could descend into “mob rule” and why Chancellor Angela Merkel chose a hotbed of leftist militancy as the venue. Germany’s top-selling Bild daily was withering in its condemnation of the chaos that saw far-left and anarchist radicals torch rows of cars, loot shops and hurl rocks and bottles from burning barricades at riot police. “One should use with caution the words ‘failure of the state’. Sadly, it applies in Hamburg,” the newspaper thundered Saturday, slamming the summit as a “debacle”. “Of course, the police...