The pattern is awfully familiar by now.

A man kills several people, his motive is hatred of foreigners.

The man was known to the police, but there was no legal basis for detaining him.

This sequence of messages has been heard over and over again over the years.

So now Paris.

The answer to the obvious question, as always in such cases, as to whether the disaster could not have been prevented, is also this time: no.

This is usually not possible, especially in the case of individual perpetrators, where personality disorders are added to the allegedly political motive.

Take the soundboard away from perpetrators

That doesn't mean, however, that society should be resigned to waiting for the next attack.

If the social climate were dominated by the principle that differences of opinion are, firstly, something natural and, secondly, can only be settled with arguments, many a confused person would be deprived of the sounding board for the step from the idea of ​​murder to the act of murder.

Then one would not have to worry that despite all the official expressions of mourning after such an act, there are not always people who - like in the days of the RAF terror in Germany - feel "secret joy" about what individuals or small set up groups.

Internal peace must be secured by the police.

But it is also a matter of education.