Rex Tillerson: Serving God and Mammnon.

The oil industry where Rex Tillerson made his mark was a fairly certain arena. The newly-drilled oil-well is guaranteed to produce; new technology was going to make shale oil commercially available and the shady atmosphere enveloping Nigerian oil was always going to get cruder and darker. Only instability in the prices of oil was going to be of much challenge but that too wasn't exactly rocket science and for a man who had risen to the top echelons of his calling, he could be counted on safely to handle that. In short, the world he was familiar with was stable, rational, fairly predictable: always within his grasp. It was a place of gentlemen and handshakes.
So, it must have been a shock to him when he decided to switch jobs and throw himself into politics. Politics is a calling rough enough and American politics is a particularly toxic variant. It wasn't an arena for gentlemen, handshakes being very, very rare and fists in ample display and use and nobody was going to pull punches. And the most combative of the pugilists was the man he was going to serve as Secretary of State, President Donald Trump, a boxer who was going to play very unfairly, not hesitating a moment to punch below the belt. And the most volatile part of American politics would certainly be found in the State Department, in foreign policy. There he would have to deal with players even worse than his master. A place as stable as earthquake-engendered tsunami. An arena where the appalling Rohingya crisis could break out at any time, where Russian hackers and exterminators were going to cause trouble at any time. An arena filled with irrational souls as Mugabe, Kim Jong-un. A theater savaged by unpredictability such as the North Korean rascal making a volte-face and proposing talks with the US all of a sudden. Moments defined by not only not knowing when the next nuclear test will take place but also not knowing whether the missile was flying towards Hawaii, or flying over Japanese mainland or was going to end up shortly in the Pacific Ocean. Torrid moments of terrorists freshly abducting schoolgirls in Nigeria. Intolerable situations in which Turkey, a NATO ally would attack  Syrian Kurds, America's staunchest allies in the Middle East, and both the president and his top diplomat would be tongue tied. Tillerson was stepping into an insane world he was never prepared for, both by training and temperament.
A world that was perfect fit for his master, by temperament. Tillerson was supposed to be America's face to the outside world but it was an America that that gone Trump, a guy who was as brash and unpredictable and unrestrained as his worst adversaries in the diplomatic boxing ring. A chap whose remarks are often off cuff and whose most coherent foreign policies could be found only on his lips and tweets. It was eerily difficult imagining Tillerson as Trump's Secretary of   State. The Rasputin Coefficient was horribly non-correlative. Tillerson, in Trump administration, was practically serving God and Mammon at the same time.
Hence he would think the Iranian deal to be reasonable while Trump would savage it as nonsense. He would lay into Russia over the Salisbury spy poisoning while his president would be uncharacteristically taciturn and quiet all of a sudden. You would think that if the president was going to accept talks with North Korea, he would consult his secretary first. A dove, so to say, wasn't going to serve a hawk. Tillerson was more studied, careful, restrained than he was a pacifist but he wasn't going to do well in a regime stuffed with hardliners and of which head was a sheriff likely to shoot first before asking questions later.
Trump admitted he didn't agree with Tillerson on most issues. Sacking him behind his back was his most poignant testament to that disagreement.