This video explains it well:
https://www.youtube.com/watch?v=EzIaIiiZIpY
Basically Trump is a very American person, stemming from a very American history and culture.
He’s not an ideal, he’s not what they want American history and culture to have been. He’s a product of what it actually has been.
This is like a modern day version of “from the sleep of reason comes nightmares”