Trump has been doing it to everyone else, just lie to the press about basic facts. Both Macron and Starmer managed to politely correct him without triggering Trump. Zelensky was trying to do the same, but Vance couldn't shut his mouth and decided to try and show to Trump he was a good boy. And once it got to that stage, Zelensky couldn't really back down.

At least he's awakened something in Europe now where everyone's basically said they've got his back. He could probably get a better deal from Europe, because from what I've read the current deal has been described as worse than the Versailles treaty, which is probably not something you want to impose on a country that already has a bunch of armed Nazis running around in it.