The Founding Fathers–every one of them, regardless of where they stood on the political issues of the day–were Enlightenment men. They believed in manners, self-restraint, science, and the power of reason. They feared enthusiasms of any kind (including religious), and government by demagogues and mobs.
You might think initially that Jefferson, with his enthusiasm for the French Revolution, was an exception, but you would be wrong. Jefferson was the quintessential Enlightenment man; not surprisingly, he hated urban mobs. He was sympathetic to notions of democracy because he saw America as a paradise for sensible yeoman farmers with a strong stake in the system who would never abuse his trust. His vision of America doesn’t bear much resemblance to its condition today, but it was plausible enough in his lifetime.
In Freudian terms, the FFs were heavy on the superego and light on the id. What would they have made of Donald Trump–a/k/a The Wizard of Id? How would they have felt about a guy in furs and a Viking hat storming the Capitol?
It was their worst nightmare come to life. Remember that when you hear right-wingers talk about how they are fighting for what they erroneously think is the constitutional order.