It's oversimplification which can only lead you to the foggy world of conspiracy theories. Modern society is complex, and full of conflicting interests, and that's why two evil dictators may have different kind of favors from US, or whatever country. There's for example a significant voting block which supports sanctioning Cuba, and absolute majority of them are not billionaires. Taking Venezuela case: as potential Russian win would send an encouraging signal to other expansionist regimes, including some who are absolutely willing to be US enemies, and big enough to make troubles, it's becoming more important to deal with bigger problem (compared to Venezuelan regime). There's an obvious solution to these ugly choice of whom of all bad guys to pay more for oil: let domestic extraction industry to increase development. But it happened so that a significant voting block supports diminishing of domestic extraction, and the ruling party doesn't want to annoy them as they have enough troubles without it. So suddenly its not only a game of capitals, but also of ideologies, family roots, voting strategies, and a lot of other elements. Some people say that is how democracy works in every big society. Also, on a side note: Netanyahu may be good, or not, but he is most definitely not a dictator.