My keep rational was
I think the controversy is notable. Arguably the article is too long, but that can be fixed by shortening, not deleting it. Also I don't think its a fork; it is its own subject. Saying it gives undue weight to the political debate is somewhat odd, because the political debate is the main point of the controversy.
G replied but the political debate was not in good faith, that's the point. The "controversy" was engineered and sustained by the climate change denial industry which to my mind is just wrong, because, as I said That the controversy was not in good faith is irrelevant to the deletion debate; that's a discussion about the page content. FWIW, though, I do not believe that the debate was entirely or originally "engineered"; it would be better to say that the flames of what could have been a valid scientific discussion were fanned out of all proportion. And of course the degree of plausibility of debate has changed over time; nowadays, with multiple independent repros, there's nothing left, scientifically, but this article isn't (shouldn't be) about the science. You are I think right that the page is too huge and doubtless duplicates much that is in the HS page.
But maybe this is a sign o' the times: all these controversies we so lovingly participated in, in the olde dayes, are of no interest to yoof today: the HS is just accepted, unless you're a nutter.
* Pic: cat of Troyes.