It's an inversion because the premise has overwhelmingly been, for a long time now, that the US invades for positive oil supply (in one form or another). It was

It's an inversion because the premise has overwhelmingly been, for a long time now, that the US invades for positive oil supply (in one form or another). It was nearly universally proclaimed by the anti-Iraq war crowd that the US went into Iraq for their oil. The inversion is that the US would be toppling nations in one form or another, or simply not propping them up, to intentionally cause havoc to reduce oil supply from competitors. It would be to harm the competing oil producers for the benefit of US production.