The Democratic Party has a lot of garbage, and has certainly stopped a lot of reform, while portraying themselves as the only party for reasonable people. They have managed to tap the energies of good people who think this is the only path they can take to help.
They have spent over a century squashing small political parties who could be a threat later. In later years they have been so successful at this that any opposition at all is viewed as almost treasonous.
But the worst thing they have done is not the above, or OP article. Their worst sin is helping to move the country away from paper ballots counted in front of human witnesses. And while there are some states that have good participation from mail in ballots, which is good. And a precious few who do ballots properly. The Democratic Party, as a whole, is utterly silent on the majority of states. Including states where they are the minority party.
They could not do this without the willful ignorance, despondency, intransigence and pig headedness of the majority of Americans.
I think these few generations of American voters will not be looked at kindly in the histories; it will be seen as totally weird by future historians.