The US was wrong about Iraq having nukes, but they were close to the truth. In reality, they were pumping Saddam full of enriched uranium so that he'd mutate and grow to a titanic size.
Yeah, I think folks here are not giving them enough credit. It wasn't just some random dude drawing lines for no reason.
The purpose of a lot of what Britain was doing was to prevent unification into a new Ottoman Empire successor. They intended the internal conflict in the region.
And it worked at keeping the Middle East busy and Europe safe for the most part (if you don't count the incalculable death toll having them fighting amongst themselves has caused, and random terrorist attacks).
I remember learning that there was a joke (but quite possibly legit) notion that the reason there's that huge, sharp indent in the Jordanian border is because Winston Churchill was drunk while he was splitting up the map and hiccuped, and that's how that weird part of the border came to be.
There's 300million people and 7 million km². I'd give everyone 20m² and an AK (making sure to split up families as much as possible). Surely nothing will go wrong with this wholely equitable division of land!