I agree it's disheartening. But I think a contributor to these responses is that activists are always saying everything is 100% settled, because SCIENCE (see,

I agree it's disheartening. But I think a contributor to these responses is that activists are always saying everything is 100% settled, because SCIENCE (see, e.g., Bill Nye). Then the doubters see that the models are complex, use different criteria, and diverge by differeing amounts. The activists lose credibility, and hurt their cause. I think a more nuanced message would be better received.