Versammlungsfreiheit
[Freedom of assembly] cannot be denied without violating those fundamental principles of liberty and justice which lie at the base of all civil and political institutions. ... The greater the importance of safeguarding the community from incitements to the overthrow of our institutions by force and violence, the more imperative is the need to preserve inviolate the constitutional rights of free speech, free press, and free assembly in order to maintain the opportunity for free political discussion, to the end that government may be responsive to the will of the people and that changes, if desired, may be obtained by peaceful means. Therein lies the security of the Republic, the very foundation of constitutional government.