Reminds me of their constant apologia for communism. "We didn't try it right, it needs another chance, it was never really run properly."
This is a part of the hubris and psychosis that one needs to be a leftist. They're "True Believers." It's not the policies or philosophy that's wrong, it's just that the people who have tried to implement those policies just weren't the right people. Interestingly enough, it's always the current crop of leftists who are the "right people" who will "finally make it all work."
Mark