Tucker Carlson spent many years as a credible journalist. He got enabled and comfortable expressing supremacist views that many people in this country have and he got blinded by the money and fame of being a Trump administration mouthpiece.
His dad was the president of the Corporation for Public Broadcasting, a frequent target of conservative ire. He was working for MSNBC before he went to Fox News, and he wasn't even doing conservative commentary, he was doing crap like hanging out at the globalist Olympic games.