Trump saw an opportunity and went for it with everything he had. He used modern tools and knew how to apply it to the modern public. He knew his audience and his audience also knew how to navigate the new medium.
I doubt he expected to do so well when he started but apparently the old world institutions and cultural protections of pre 1990 are well and truly dead.
Tomorrow someone else is going to navigate this path, and they are going to do it better.
* Minarcho-capitalist, "Snow Crash"-style. Absolutely minimal government, only contracts and property titles being enforced. On everything else, you're free-to-starve.
* Religious dominionism, Mike Pence style. "Electrocute the gay away". Scary and weird. Kinda like a Middle Eastern country.
* So-called "right-wing populism", aka fascism. Trump's typical style. Very nationalistic, often claiming to adopt left-wing economic policies like industrial management and regional equalization while actually installing policies more similar to the minarcho-capitalists, but with more corruption. Dog-whistles to religion but no real religiosity. Military parades in the streets, Orwellian blatant lies, etc. Cult of leadership.
We should expect to see more of this, there is no one to moderate his behavior that I can see at this point.