It is easier, and more comfortable, to dismiss extremist views and if necessary to use force to eliminate those who hold them. This may sometimes be necessary, but it is no long-term answer.

There are many factors which contribute to extremism. But one is the belief by some, from diverse religions, that by their actions they are serving God – and especially how they find authorisation for these actions in their scriptures.

A million migrants reached Europe last year from the Middle East and Africa, half of them from Syria. A million more are expected this year. This will not stop until peace prevails in Syria and Iraq. People fleeing for their lives do not obey border controls. We Europeans need to do all we can to resolve the conflict. And we need to care for the refugees.