(Probably) starting from the First World War, Media became a very important part of Politics. As a result of the Allied propaganda offensive, even the German population, towards the end of WW-I, started feeling that Germany waged the war, and it was unjustified in doing so. (I am supporting neither- just presenting what happened.)
Media started affecting Politics. Politics started affecting the Media.
Nazis came to power in Germany by manipulating Media well. (It’s not the sole reason, but one of many.)
During the Cold War, USSR propaganda machine lost terribly in propaganda war against the more glossy US media. This created widespread resentments against USSR and communism- even inside USSR and sympathetic countries. For example: in Eastern Europe. The fall of USSR was probably more due to internal problems than external ones (aka US aka capitalism), the loss in the propaganda war played it’s part.
Propaganda is not always obvious. Especially outside the news media.
Let us take, as an example, the movie, Forrest Gump. He is a vietnam war veteran, saving his injured comrade-in-arms in battleground by carrying them to safety. His girlfriend is in the company of the hippies- the bad guys who beat women up and live squalor life.
There are more obvious examples, like Rambo.
These things affect us, even when we do not know.
It is because of the Media that the US public has not protested much against Afghan or Iraq invasion. The media made it clear to them that it was necessary to wage a war. They believed it. There being almost no alternative view presented, they had no option.
The media, in the hands of some really clever guys are slowly poisoning the people with Islamophobia. (Hatred does not pay. It is against their long term interest to do it. But… well…)
These strengths are twined with it’s weakness. It is that it is unable to protect itself. Media needs a helping hand in politics to keep it alive.
And that kills it.