Allegory

Ever know someone who made utterly wild, fantastic claims about one of your friends? Really off the wall stuff about what she is likely to do, or be capable of? And he tries to get other people to say the same things or worse about your friend? And then you catch this person and his clique in lies, both verbal and written? But their reaction is to simply change their story, deny they lied, while they increase their yelling and also abuse anyone who stands up for her?

Makes it hard to believe them, even if there really is some truth to what they say about your friend, right?

That's global warming.

When you have the truth on your side there's no reason to scare monger, lie, and silence those who disagree. The fact the global warming side does these things is the reason I remain skeptical.