It may be obviously about oil, but it's also less obviously about rare earths. I don't know how much of it Venezuela or their other neighbors have but here in Brazil there's a lot, and as the regime's meddling for the last many years hasn't led to as much theft as they wanted they might be trying to use their attack, theft and murder against Venezuela to make moves here too. Though if those moves will be just threats or attacks will depend on what they can get away doing against Venezuela...