God forbid someone should say "I don't agree that we have enough information to establish a global tax policy given the inaccuracy of previous economic models" - they must be a denier!
It takes away from the real hard work people do when a Swedish teenager is paraded around with a scowl and a waving finger that points at everyone but China. I think it's a mistake and sets the whole work back, but what do I know!?
When it's really about science and not taxes/power, I think more people will accept the ideas.