The climate is already changing, the goal is to reduce the amount of change.
The problem is the effort is not to reduce the amount, the effort is to send change, however slightly, in a VERY BAD direction.
We already know the Earth will enter a glacial period again. It may even be tending to do so now, we really don't have the understanding of climate to say for sure.
THIS. Somebody, finally, who fucking GETS IT!
On geological time scales, there is no such thing as a stable climate. We WILL enter another ice age, sometime in the next 1000 years or so. When we do, there will be no chance in hell that earth will support its current population. I'd estimate that Earth's population will be reduced to significantly less than a billion, through starvation, disease, and resource violence. That's over 80% (probably 90% by then) of the world's population that will be wiped out, simply because there won't be enough food, water, or non-glacier-covered land for everybody to live. Most of the equatorial regions will be desert, and pretty much everything more than 45 degrees latitude away from the equator will be covered in kilometers thick ice.
The Black Plague didn't wipe out anywhere near this percentage, and we consider that to be a huge disaster.
If we can, through man made activity, prevent the next ice age from happening, even if it does cost of a couple of small island countries, the environmental and human cost is astronomically less than the ice age alternative.