How is he wrong about global warming? As far as I know he doesn't say it doesn't exist, just that compared to other issues facing humanity, the data doesn't actually indicate global warming is the biggest threat to our future.
Other than going against the current unchallengeable orthodoxy, I think that is a valid hypothesis that is almost impossible to disprove, but is certainly worth debating.
He spent a lot of the chapter pointing out that the IPCC climate models have problems and could potentially be inaccurate. But his takeaway seems to be that global warming might be mild and so we don't have to worry that much while my takeaway is that most of the reason to be afraid of global warming is in the tail risks for things getting much worse than IPCC projections.
Are you worried about the tail risk of an asteroid hitting the earth, or a super volcano explosion? Or a pandemic for that matter? Does humanity do enough about those? How do you resource allocate between all these tail risks?
Other than going against the current unchallengeable orthodoxy, I think that is a valid hypothesis that is almost impossible to disprove, but is certainly worth debating.