Those are also just different mirrors. Social media is a greater number of faster-responding mirrors, but the concept remains the same: the content reflects the desires of the audience.
I place all the blame on individual users. They are the ones that must alter their behavior. Each individual must come to understand how they manipulate the content they see. I don't blame talk radio and facebook for turning my aunt into a crazed right-wing conspiracy theorist (the really bad type. She believed pizzagate, probably still does.) She has done this to herself and only she can dig herself out of the hole. The family can support her, as one would any other addict, but the individual must want to change.
That said, that should not let leadership off the hook. For those three mentioned leaders to abuse their power __at all costs__ in order to maintain their power can not and should not be discounted.