Adams is a guy who views everything through the idea that everyone is trying to manipulate and play a game, and first the manipulate themselves. He believes that everyone is viewing the world so differently that its like they're watching a separate movie from one another. He's big into confirmation bias and verbal tricks.
Peterson is psych prof with an interest in the horrific ideologies of the past and religion as a product of cultural evolution. He's a classic liberal type.
Harris is an atheist and leans left.
Adams is the only one of the three who like Trump and he tends to like Trump for how he plays the game. People listen to him because he's predicted some things, including the North Korea situation and Trump's victory.
I went through Rubin's follows, and there's lots of Red Pill people on there, from Dave Rubin to Pinker to Quillette and its founder, and even Nassim Taleb. He's also got Yoko Ono and the left leaning press.