What about mass migrations out of and wars in regions where climate change triggers famine and disasters like stronger storms and higher sea levels?

We sell them guns and profit off it... the same we've ever done.

What I'm really afraid of, if these global warming predictions come to pass, is that we will be so stupid that we will let millions of them to come to Europe. See what's already happening in the Mediterranean, etc. That would bring the war here.

Let's wait for his next argument. My bet goes along "it's brown people, they don't matter/they deserve it".

dT becomes |dT| as soon as one points out the positives of higher temperature!

People also die from human stupidity and hubris (USSR experiments with agriculture). The arbitrary and idiotic policies of net zero could bring mass poverty and result in migrations and conflicts.

That may start changing sooner than you think. Search Google for "wet bulb temperature" and then check how parts in the India and China are so near it, and then consider than +1.5 on average, the sea wau less, the land way more.