His spokesperson said Londoners only wanted to see public money being paid to companies that “share the values of our city”.
I wander if they'd care to further elaborate on that.
Palantir is effectively a US spy company, and let's face it, even Iran have a better international rep than the US right now.
He's just reading the room - no-one wants to be associated with the current US regime, and given Trump's specific dislike of him (you know, because he's not white), he probably doesn't seem to see much reason to beat about the bush.
The US has proven to be a bad international partner, they flout international law, they engage in piracy, their political system is prone to rapid and catastrophic change, and the people there seem to be just fine with electing a narcissistic fraudulent rapist and felon as president. Twice.
Not just "No" but "Hell, No!"
[ITT: Watch the butt-hurt USAsians downvote because they're not used to someone telling it as it is about the USA]
Not paying the people helping bomb children in Gaza and Iran is a good start.