Disgust is a challenging emotion to study because it is so intertwined in the brain. Moral "disgust" activates the same region as the "man eating a can of worms" example in the article. It activates the same facial expression. Even our language fails to separate the emotions at times as dis-gust (i.e., gustatory) can be in reference to disgusting behavior. VS Ramachandran discussed this in a lecture but I can't find a link.

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.

Side note, the most disgusted I recall feeling in both senses of the word was hearing a military leader describe a delicious a piece of chocolate cake while simultaneously describing the bombing he ordered on a foreign country. He could describe the cake in great detail but he forgot what country we had bombed the previous day. My right leaning friends didn't see this as a big deal.

As an extra data point, I have eaten worms on a survival trip and was fine with it and I never really liked chocolate cake. So maybe this line of research has merit.