Also, the claims made are so sweepingly apocalyptic -- we're all going to be dead in a few decades! -- that they're going to trigger not only the usual climate-

Also, the claims made are so sweepingly apocalyptic -- we're all going to be dead in a few decades! -- that they're going to trigger not only the usual climate-skeptic suspects, but also those who are genuinely concerned about climate change. The magnitude of the crisis we're stumbling into is hard to fathom, but these sorts of claims are arguably counterproductive in that they could just cause many people to give up out of the assumption that it's too late to save the global food web.