What is striking about the fraud is the blatant clumsiness on display: the Democrats aren't even trying to hide the fact that they are manufacturing ballots in industrial quantities. This is really, really interesting, and suggests that their motive is not simply to install their preferred candidate in 1600 Pennsylvania Avenue. It suggests that the motivation is deeper, and darker.
Theodore Dalrymple studied Soviet era propaganda - the propaganda targeting not a western audience, but instead the populations of the Warsaw Pact. He was struck by how crude it was:
In my study of communist societies, I came to the conclusion that the purpose of communist propaganda was not to persuade or convince, not to inform, but to humiliate; and therefore, the less it corresponded to reality the better. When people are forced to remain silent when they are being told the most obvious lies, or even worse when they are forced to repeat the lies themselves, they lose once and for all their sense of probity. To assent to obvious lies is in some small way to become evil oneself. One's standing to resist anything is thus eroded, and even destroyed. A society of emasculated liars is easy to control.
I think that this is what they're after - showing the country that they can steal an election and there's nothing that we can do about it. It comes from the same source that causes cities to remove statues of George Washington. It's showing who's up and who's down.
The crudeness of it all isn't a bug - it's the primary point to these people, who believe that they have a fundamental right to rule.