Why do you imagine that it is the Democrat's duty to "educate the loons"?
They are as busy as the other side trying to pull the wool over everyone's eyes.
And don't be calling the Democrats "the left" either, because there is nothing "left" about them. They are a purely centrist organization and they are fully owned and operated by corporate interests.
Democrats have actively spurned any candidates with progressive views or agendas...invariably funding and supporting their centrist opponents in primary races. You're going to need to look beyond what passes for opposition to the authoritarian right, Democrats are craven placeholders for what should be the battle of our lifetimes.
No such battle is going to occur. Big money has complete control and voters haven't the balls to elect candidates capable of governing.