It has been proven without question that it is hotter now than it has been in 1000 years.

Link to government website.
https://www.ncdc.noaa.gov/global-warming

The new climate denier stance is that you can't prove 100% without a doubt that it's human activity. The past decade has ended the "Is the temperature really increasing" debate.

The stories all have a foundation -- the sky is falling, in this case, the earth is warming, growing warmer, and the cause is sin, human sin from human greed and corruption, for human activities that release CO2 which is warming the planet dangerously, melting glaciers, ice in the Arctic and Antarctic, making the oceans acid and killing the coral reefs, killing off food for the whales, making the lobsters move farther north, raising sea levels, flooding low lands, killing the polar bears, etc.

This article did not mention CO2, sin, greed, or corruption. There is a lot of FUD being thrown around in the public these days, but I didn't find any of it in this article. Maybe I missed it, so feel free to pull out some choice quotes.

More than 50% is caused by CO2, which mostly comes from powering our homes and cars (burning fossil fuels). You can be sinful using green energy as well.

Global warming doesn't cause acidic oceans. You're thinking of acid rain. You don't hear about it as much any more because congress passed The Clean Air Act. Since then there's been reduction of acid rain. I'm old enough to remember when acid rain was a "naturally occurring phenomena and not provably linked to industrial byproducts"

https://en.wikipedia.org/wiki/Acid_rain#History_of_acid_rain...

The temperature has been very stable for the last 10K years. It's only been very recent that we've had such an uptick. Scientist are able to discern the temperatures of the past through core samples. Those samples also show dramatically higher CO2.

NASA site: https://earthobservatory.nasa.gov/Features/Paleoclimatology_...

You chose to highlight the years from 1940-1970. This isn't a discussion about the natural oscillations in weather. This about the proven sharp increase in temperatures as it compares to on a paleo scale.
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1. The earth is warming at an accelerating rate

2. High levels of CO2 have been linked with paleo level rising temperatures in the past

3. Our current CO2 levels are orders of magnitude higher than anything found in the past.

4. If the temperatures continue to rise the sea levels will rise, storms will become stronger, and we'll have both more floods and more droughts (depending on where you are). There are a host of other ecological impacts.

Our options are:

a) work with the rest of the planet to alleviate the likely causes as currently determined by analysis of the data and research of >95% of the science community. At the same time we can continue to research and refine our understanding.

b) We can assert that none of this is true and hope that it will magically get better on it's own.

The earth is going to be fine. We can kill everything, including ourselves, and the planet will just keep turning. There's other planets in the solar system that are also fine, we just can't live on them.

The goal isn't to save the earth. The goal is to make sure we aren't turning the only planet we have into something either uninhabitable, or a nightmare.

P.S.

Then, sure, we get lots of stories about why we must fight climate change -- how the heck to do that? Like the Mayans who killed people to pour their blood on a rock so that the sun would keep moving across the sky and, thus, avoid climate change if the sun stopped?

This is a bullshit statement.