It doesn’t matter how long you make them read Lenin and break rocks in the gulag, the second you let them out they’ll see an AI generated meme from a CIA holdout posting from a bunker somewhere and immediately revert to being a burgerbrained fash.
I think we need to just dump them on an island somewhere and put them under continuous naval blockade and internet blackout till they revert to a Hunter gather society.
The American left aka a very niche portion of the american left just has divorced themselves from the democratic party - there was barely any trying.
The largest movements of the left were BLM and occupy and they ended up being sucked out and assimilated into the state apparatus.