[nl]

Not to detract from your point, but you neglected two of the archetype of the tragedies arising from State-controlled media propaganda:

The role of the Serbian, Croatian and Bosnian media in the wars following the break up of Yugoslavia[1].

The role of state controlled radio and TV in the Rwandan genocide[2][3]. To quote from [2]:

From October 1993 to late 1994, RTLM was used by Hutu leaders to advance an extremist Hutu message and anti-Tutsi disinformation, spreading fear of a Tutsi genocide against Hutu, identifying specific Tutsi targets or areas where they could be found, and encouraging the progress of the genocide. In April 1994, Radio Rwanda began to advance a similar message, speaking for the national authorities, issuing directives on how and where to kill Tutsis, and congratulating those who had already taken part.

[1] http://en.wikipedia.org/wiki/Role_of_the_media_in_the_Yugosl...

[2] http://migs.concordia.ca/links/RwandaRadioTranscripts.htm

[3] http://news.bbc.co.uk/2/hi/africa/3257748.stm