Social media pushes the illusion that you are not engaging with professionals but peers, and the dominant signals (how many views, likes, comments, etc.) of this day and age were not present with TV. This seriously messes with the innate reasoning of most humans, because for all our individualism we are norm conforming herd animals.
Show a kid a celebrity pushing something and they can tell it's fake. If the same thing is pushed by all of their friends, now we're in the territory of peer pressure which is a different ball game!
This is really basic bio stuff about Limbaugh, and it doesn't speak well of your other assertions if you got this part so wrong.
What's really funny is that during the 90s the "Greatest Threat To Democracy Ever" WAS talk radio, more or less solely because the Limbaugh program was so popular. The targets may change, but the talking points never seem to.