That is clearly very bad, but people also go to war because of scarce resources. The US doesn't have a Special Relationship with Saudi Arabia because the Saudi's are lovely people.

Climate change isn't the threat, the problem is that population growth is exponential. We don't have a reliable mechanism to shrink population apart from run out of resources and have a war. Claiming that climate change is making resources scarce isn't grappling with the fact that in 100 years at 2% population growth, resources are going to be scarce anyway.