It’s the only way to save the democrats and save America.

I mean, unless you think that the essential functions of the Democratic party are to reverse climate change, dismantle white supremacy, and fight the patriarchy. Because those causes have really taken it on the chin in the last few election cycles with the rise of economic populism. I think that's probably a good thing for Democrats' electoral chances, TBH. But the rise of populism as a powerful faction within the Democratic party has come at tremendous expense to the factions that were centered around those issues. Arguably, less so than the "corporate" Democrats you disdain - who have definitely lost some of their power within the party, but not nearly as much as the Greens and the minority rights coalitions.

Purging the heretics always sounds fun in theory. The problem is that you can't purge all those Clintonites from the party, else you won't have enough people in the party to win majorities. I'm sure the Third Way libs would stfu and stop trying to kill progressive candidates if Justice Democrats and the populists would stfu and stop trying to kill centrist candidates - but I think having those contests between competing policy visions is actually good, rather than something to be "purged."