Quite frankly I think it's the traditional media losing importance due to social media and making it look evil. The only way they can make money is by selling outrage.
How can I prove that someone has intent of doing something? You can take a look at the news revenue over the years and the efforts for getting paid for displaying headline in Google.
Well, if you had some documents showing that some folks in the news industry really didn't think social media was that bad, but they just thought it was bad for the news business, so they conspired to make social media companies look evil, then that would prove your point.
But until having something like that, you're just guessing.