CO mass shooting: Will this time be different? 19:23 Dominic Erdozain is a research fellow at Emory University and a former lecturer in the History of Christianity at King's College London. He is the author of "The Soul of Doubt: The Religious Roots of Unbelief from Luther to Marx." The opinions expressed in this commentary are his own; view more opinion at CNN. (CNN)Every time America suffers a mass shooting, I wonder how James Madison would have reacted. Despite the grinding familiarity of gun massacres, today's America seems to have developed strategies of denial. Many on the right would arm everyone except "felons" and "the mentally ill," and the left teaches a version of the same dichotomy: The problem is not "firearms themselves," it is often argued. It is "who gets access to them."