[Classics] Socialism and The Churches
"Here is the answer to all the attacks of the clergy: the Social-Democracy in no way fights against religious beliefs. On the contrary, it demands complete freedom of conscience for every individual and the widest possible toleration for every faith and every opinion. But, from the moment when the priests use the pulpit as a means of political struggle against the working classes, the workers must fight against the enemies of their rights and their liberation." (Luxemburg)