It was the first time that Thomas Haldenwang, president of the Federal Office for the Protection of the Constitution, or BfV, had hosted his agency’s traditional symposium. The event on Monday in Berlin was titled “Mobilization Capability in Political Extremism” — referring to issues beyond Islamic extremists, the group that was almost the exclusive the focus under his predecessor, Hans-Georg Maassen. Haldenwang also put right-wing and left-wing extremists on the agenda.