“I'm not upset that you lied to me, I'm upset that from now on I can't believe you.” ~ Nietzsche in Beyond Good and Evil (Aphorism 183)
Nietzsche is right. Those who are caught lying lose their credibility. You can’t be sure that they won’t lie to you again. The satraps of the mainstream media should pay heed—their credibility is gone. The newspapers and the TV channels have been lying so outrageously to their readers and viewers that now it is impossible for people like me to trust their stories.
Paraphrasing Nietzsche's words: “I'm upset that from now on I can't believe the newspapers and the TV channels.” A significant part of what goes around as daily news is propaganda.