Climate alarmist: Google "climate change since 1900" and you'll find plenty of articles and studies based on the same dataset. If you follow the scientific method using this dataset, you're forced to draw alarming conclusions. Additionally, even if these conclusions are wrong, steps towards a greener Earth hurt no one, and provide varying benefits to everyone. Google "aqi map usa" for a taste of the subtle irritants we tolerate in many regions. It feeds our collective ego to believe we make a difference, and its good for society to see people looking to take responsibility.

Climate skeptic: Google "climate change since the beginning of time" and you'll find datasets that show us entering and exiting multiple ice ages without human intervention. If human intervention didn't pull us out of the previous ice ages, now probably has nothing to do with us as well. We still aren't as warm as the Roman period, and the climate alarmists need to show how a smaller population with no fossil fuels managed to have a larger impact on world climate. The planet is fine. Head on over to /r/climateskeptics for more.

A lot of climate alarmists are researchers or businesses that would not be profitable without climate alarmists in social media. This is generally the crowd of "science", so the "climate change deniers" are usually religious fundamentalists that don't trust science. This leads to the former group disregarding the ice core datasets because it conflicts with their politics, and the latter disregarding it because it conflicts with their religion. You'll find so many arguments low on the argument pyramid