>Oddly before opening the article I had assumed it was about how moral "disgust" is positively correlated with left-leaning. But then the study was referring to digestive disgust which appears positively correlated with right-leaning.

Actually, even moral disgust is positively correlated with right leaning folks. The Righteous Mind (https://www.amazon.com/Righteous-Mind-Divided-Politics-Relig...) is a great read that covers the research on the topic.