They aren't suggesting climate change is hyperbole, they're suggesting that the reason many people are able to dismiss climate change is because articles like this reek of sensationalism. In otherwords, in an attempt to get people to listen, they are turning people away as readers can pick up on the hyperbole and feel they're being manipulated.

If instead we spoke about the issue factually, to the point and without trying to influence people's opinions with emotional devices, more stubborn people might listen to the idea.

It's a shame, because if ever there were a real enough reason for an evangelical to scream in the streets at strangers that the world is ending, this might be it. But it doesn't work, people don't listen to the screaming crazies.