Where did the paper/article talk about stealing? It's mostly about arrests and "juvenile detention" [1]. That is, a measure of how frequently the US state imprisons people, which it does more than anyone else. And it targets an ethnic minority which it can no longer enslave.

(BTW, what's the excuse for the US sending killers across the world to steal control over people's resources? "Amusement and status" as well? Such answers lack any systematic analysis. Not to mention consistency; you could apply it to any ethnic group. Unless of course there's racist motivations...)

[1] http://www.nber.org/papers/w21178