Define rationality:

https://www.aljazeera.com/gallery/2022/3/16/photos-russian-bombing-leaves-ukraines-kharkiv-in-ruins

If blowing up hospitals, apartment buildings, and attacking nuclear power plants is rational, then okay, he's rational. If using his citizens as cannon fodder is rational, yes, indeed he is.

Hollande is being very French here: "“He [Putin] is a radically rational person, or a rationally radical person, as you like"

That's French for "crazy."

Hollande himself, and this is before Putin isolated himself in the Kremlin and before he shut out all opposition voices, said of his meetings with Putin:

“He’s got his own reasoning and within that framework, he’s ready to use force. He’s only able to understand the [power] dynamic that we’re able to set up against him.” This is before the war. Putin is now more isolated than ever, which tends to add to the cray-cray of anyone.

Again, "his own reasoning" is the polite French way of saying, "he's loopy as a loon but we tried."

Finally, according to the article:

-- It made sense to speak with Putin before the invasion to “deprive him of any arguments or pretexts,” he said. But after a “brief period of uncertainty” following the invasion, “the question [about the utility of dialogue] was unfortunately settled.” --

I appreciate your arguments, but Hollande was not your best choice as a line of defense. He himself says that the "utility of dialogue" is settled.

Ultimately, the Russian military will use the same tactics it used on Grozny. The ground troop effort will fail, and Putin will pulverize Kiev and other cities into submission.

Again, I'll ask: what would you recommend we offer Putin to stop this? I haven't seen anyone anywhere offer a realistic olive branch.