Kirk's skill lay in bombarding his opponents with so much pseudoscientific bullshit, gibberish, and nonsense that it became impossible to contradict him.
Otherwise, he was a slimy little Nazi propagandist with good manners and kid gloves, who knew how to flute his inhuman ideology to the masses with a friendly smile, looking less stupid than those who listened to him.
Although it must be said that he did make a rather stupid impression.
For the average nationalist rabble, that was perfectly sufficient. Their role models must not appear too educated or intelligent, lest they feel overwhelmed, which is a real balancing act at that level.
Trump has also masters this "art" perfectly.
.@RepAOC@AOC on House-passed resolution honoring the life and legacy of Charlie Kirk: "Instead of uniting Congress in this tragedy with one of the many bipartisan options to condemn political violence and Kirk's murder, as we did with the late Melissa Hortman, instead the majority proceeded with a resolution that brings great pain to the millions of Americans who endured segregation, Jim Crow and the legacy of bigotry today."
Reagan started all this Fascism off by ending the Fairness Doctrine, allowing corporations to buy up all the Local Stations, starting right-wing hate Radio. Allowing Murdoch to broadcast Right-Wing "News" which they claim is simply "Entertainment"