Encouraged by the U-turn in the U.S. energy policies under President Trump, investors are back to backing oil and gas majors as the self-righteous ESG hype is waning, especially in corporate America. For all the environmental, social, and governance craze of the past few years in markets, ESG has done value investors one big favor—it has helped sink the valuations of oil and gas companies to bargain levels, alongside the oil price crash of 2020, of course. These super-low valuations of Big Oil and other oil and gas firms have encouraged bargain…