In his book RENDER UNTO DARWIN: PHILOSOPHICAL ASPECTS OF THE CHRISTIAN RIGHT'S CRUSADE AGAINST SCIENCE (2007), James H. Fetzer works with deontological moral theory to work out his position regarding legalized abortion (pages 95-120). In other chapters of this book, Fetzer does engage in forms of argumentation in which the arguments advanced by the Christian right regarding evolutionary theory are joined and debated in pro-and-con debate.
In conclusion, if you have no prior commitment to a tradition of moral theory, you might find Haidt's book interesting, but I would encourage you to read other books as well such as the books I've mentioned above. However, if you have a commitment to a tradition of moral theory, you might find Haidt's book stimulating and perhaps even thought provoking in places, but you might also figure out ways to criticize it in places.
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