I'm the first guy in line to cut into economics. To me it's just astrology for people who know calculus. Or, as one wag put it, How many economists does it take to reach a conclusion?
But having said that, the practitioners themselves are just as aware of the problems of the "science" as anybody else. I'm also not crazy about Jungian psychotherapy, but you don't see me protesting outside the psychiatrist conventions.
While I may disagree with methodology, and I may even argue politically about policy implications based on conclusions various sciences reach, I remain convinced by the Charity Principle that these folks are working in good faith. What I'm seeing here are people who don't want other people in positions of authority because they disagree with their conclusions. This looks uncomfortably like an ecclesiastical dispute.
So as bad as economics and economists look? These protesters look worse. Terrible thing.