If we want to defeat Islamic State, we first have to arrive at a cease-fire agreement in Syria. Once that has been achieved, an anti-IS coalition can be assembled, including Russia, Saudi Arabia and Iran. That, however, will be significantly more difficult in the wake of Turkey's downing of the Russian plane.

I am critical of the fact that Hungarian Prime Minister Viktor Orbán is pulling out of everything - the joint approach to the refugee issue, for example. He cannot disparage his colleagues in the EU either - that's not how we treat each other. We require solidarity: in refugee policies, just as in the financial architecture of the structural funds from which countries like Hungary have strongly profited from for years.

We're at a historical juncture: A growing number of people are declaring what has been achieved over the past decades in Europe to be wrong. They want to return to the nation-state. Sometimes there is even a blood and soil rhetoric that for me is starkly reminiscent of the interwar years of the past century, whose demons we are still all too familiar with.

European policy is always an interplay of rationality and emotion.

The ESM, the European Stability Mechanism, is not funded by Germany alone. Twenty-seven percent of the bailout package comes from Germany. Italy and France together cover a total of 38 percent. That's reality. It makes no sense to say that everyone wants to get at Germany's money.

Donald Trump is not just a problem for the EU, but for the whole world.

The question of societal fairness is always pertinent.