[int_19h]

Intent matters. Palantir specifically makes surveillance tech, and specifically markets it to governments.

As for compelling arguments... is the history of most of the world's governments not enough for you? In US, you can look at the census for a case in point: this data was used to chase draft dodgers during WW1, and to compile list of Japanese for internment during WW2. Curiously, by WW2, the federal census law had specific provisions preventing the Bureau from disclosing that information to any other government agencies, precisely to prevent this kind of use - Congress simply repealed those provisions. Nevertheless, the Bureau subsequently denied sharing that data and buried any leads, so we didn't have definitive proof until this century.

Or we could talk about COINTELPRO, PRISM etc.