You are fixated on Fox, that is certain. I am not. I have never defended Fox, here or elsewhere, so I'm not sure what you're on about.
My exposure to the various cable news outlets has long been limited almost exclusively to segments from their marquee names - Maddow and Scarborough in the case of MSNBC - which is all blatantly and obviously partisan, and selective in information presented. Which is fine. The cable networks all program to satisfy their viewers and generate advertising dollars. All of them have small viewerships - even mighty Fox comes in at something like 3 million viewers in a country of about 340 million people. To the extent I've seen reporting on hard news on any cable news outlets, always when travelling, it all mirrors the content, style, and often even order of other outlets like the main network news channels. I previously explained why I think all television news is poor quality.
Your false choice - "and to not admit this is to put oneself in the 30% of US population that forms the Trumpian base" - is strikingly close to "[e]ither you are with us, or you are with the terrorists."