Why do global warmers scaremonger so much?

It's the only way to get what they want. Read the whole thing and follow the links but here's a sample.

"So, yes, climate scientists might exaggerate, but in today’s world, this is the only way to assure any political action and thus more federal financing to reduce the scientific uncertainty."

"We have to offer up scary scenarios, make simplified, dramatic statements, and make little mention of any doubts we might have."