Yes, if you don't believe in Global Warming, you are just stupid. I'm not gonna hold your hand when I make you aware of your intellectual insufficiencies - you are stupid.
Now that you know you're stupid, you can either choose to reinforce your stupidity by living in a delusion or you can do a bit of research and catch up to the average human. I don't care either way, but you're passed the point of claiming ignorance. Eventually the stupidity is self-enforced, meaning you and others will go out of your way to ensure you are stupid.
However, I give people the benefit of the doubt and assume they have a functional brain. Therefore, I conclude if someone "doesn't believe" in climate change, that is a choice. Not a matter of ignorance.
I do not pity you enough to spit in your face with hand-holding and euphemisms. There is a deliberate choice and I'll treat you as such.
If I was to do the same to you, would you not protest?
If you interpret that as a worse outcome, here's a thought: stop being willfully contrarian. Sometimes the most popular and most researched opinion is correct. You gain nothing by being contrarian.
Being skeptical is good. Being skeptical means you require a wealth of evidence to believe something. Well, if you don't believe in climate change, you're NOT skeptical - you're just an obnoxious contrarian. Because we have a wealth of evidence and I'm assuming you've reviewed it.
Because of normative cognition, which you suffer from, and which is causing the planet to warm up.
No problem though, you carry on just as you are, no need for you and yours to improve yourselves.