Weltanschauliche Neutralität, Meinungsfreiheit, Sicherungsverwahrung

What do neutrality or laïcité mean today? Do recent social developments have a retroactive effect on their meaning? Where are the limits on opinions whose aim is to abolish the democratic order? What points of reference does the concept of a »wehrhafte Demokratie« have? How is it possible to weigh the »Grundrechte« of the person concerned against security interests in the case of preventive custody? Is it possible to detect convergences in national approaches to solving the problem?