UN Declaration of Human Rights

Article 19

Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through media and regardless of frontiers.

Everyone a fair say in what they believe in no matter if it is right or wrong and shouldn't have to be worried about interference from people who don't believe in the same thing.

In world war 2 people did not have any freedom, they were stripped in all that they believed in and could not state their own opinion because of the fear terrorizing them.