When Henry Kissinger died Wednesday night at the age of 100, the overriding feeling on a large swath of the internet was, well, release. The former secretary of state and national security adviser—and the architect of some of the bloodiest expressions of U.S. foreign policy—outlived his old bosses Richard Nixon and Gerald Ford by decades, becoming an adored figure within the United States’ Beltway elite, a sought-after counselor on world affairs, a prolific writer, and also an investor in Theranos. For those familiar with the lowlights of Kissinger’s career as secretary of state—carpet-bombing Southeast Asia, ruining early chances for peace...