I think you misread. In fairness, I arranged the sentence awkwardly, as I do often. I think my mind was conjuring the various dooms and then trying to rephrase the doom into the doomer.

What I mean is the people who warned against it were vindicated.

Of course vindicated may not the best word to use. If I say the world blows up tomorrow and you say it can never, and then it blown up, perhaps I’m not necessarily vindicated. But I certainly get a brief moment of schadenfreude