The journalists and editors have their own agenda. They used to manipulate the public so easily. Today news is democratized. Everyone publishes news, google, FB, twitter are just platforms. They don't discriminate against anyone.
Do you really believe this or are you just casually throwing it out there to see the response?
Google, fb, et al most certainly do manipulate and discriminate against everyone. By design they give you the information you already know, believe and want because this increases engagement and usage. They're not giving you "news" as by definition journalism is intended to be balanced and unbiased. The existing platforms don't want to give you a wide cross section where everyone will disagree with certain components; that would be bad for business.
If you're worried about this (good for you!), broaden your "platform". Don't rely on G and FB to tell you what they aren't telling you. It's somewhere on the web, though.