The difference between the Rs and the Ds is that the Ds mean it.
Recent suspicious obituary of David Graeber, anarchist idea guy for the Occupy set may count for your update. He was probably scheduled to lead/coordinate the September 17th Occupy DC til the election, but coincidentally died before arriving.
I think they mean it more than the Rs. That is true. But I also believe they lie to their base a lot. They promise too many things that, if done, would literally be the almost instant suicide of our country. Most of them are not stupid enough to do those things, and they will keep people like AOC in check to at least some degree. And if people like her stray too far off the reservation, well, remember the 60s. There was a lot of assassinations, and they all involved Dems. Looking back with the lens of time, I see it as a party cleansing by the Ds.
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The societal changes that have placed us at the point of either re-electing Trump or watching the Political Left obliterate US sovereignty and intigrate us into a world government are signs that the LEft has not lied that much at all. They have steadily been doing what they are doing for decades.
The only sense in which they have lied is downplaying the changes that they will make when they get into power. Occasionally this gets them into trouble when people actually see the results of what they voted for. But the Left is unabashed about where they want to take the country. Only apolitical people (of which there are many) are ignorant of this.