I have repeatedly stated my admiration for Jonathan Haidt's work, but because I am who I am with natural suspiciousness, I usually only note this in the context of my main point of disagreement. It is unfair of me. I find his books informative but difficult to read, but that shouldn't prevent me from praising his name in the gates.
Haidt's research shows that conservatives make moral decisions on the basis of five factors, liberals only two. If you are conservative, you think that this is because conservatives are less simplistic, more nuanced, more philosophically aware of complex moral issues. If you are liberal, you think this is because your two axes are the important ones, and the other three extraneous.
My objection has always been, from the first time I read his research a decade ago, that the distinction is not that absolute. Liberals also evaluate morality along the other three lines - of purity/disgust, especially. His original questionnaire just didn't pick that up, because of the bias he (initially) brought to that study.
Here is another example. Purity/disgust is indeed part of the liberal repertoire of moral decision.