Laupot analyzes the reference to "Christiani" in Tacitus' fragment 2, specifically as to whether it is a later Christian interpolation or an authentic extrabiblical source. Finding connections between a parody of Isaiah, the Christianoi of Acts, and certain writings of the Church Fathers, the author brings all of these elements together to conclude that fragment 2 is authentic and not the product of a later redactor.
Severus Is Not Quoting Tacitus: A Rebuttal to Eric Laupot (2006)
In "Tacitus' Fragment 2: The Anti-Roman Movement of the Christiani and the Nazoreans," Eric Laupot argues that a passage in Sulpicius Severus actually comes from the lost section of the Histories by Tacitus, and is therefore a very early testimony that the original "Christians" represented a major Jewish rebel movement that participated in the War of 66-70 A.D. and used the Temple as its base of operations. Carrier points out several flaws in Laupot's argument, noting that alternative explanations of the facts are far more probable than Laupot's account given current historical knowledge.
Response to Richard Carrier's Alleged Rebuttal (2012)
According to Eric Laupot, Richard Carrier's alleged "rebuttal" to his first Vigiliae Christianae article published in 2000 is extremely muddled, as Laupot never referred to the Christiani as Christians or implied that they were Christians. Instead, Laupot has always maintained that the Christiani were Jewish Zealots or anti-Roman guerrillas (as opposed to pacifistic Christians)—an opinion ironically shared by Carrier himself! Carrier and Laupot therefore arrive at similar conclusions by different routes, a circumstance of which Carrier appears to be entirely oblivious. Carrier thus does not appear to understand Laupot's work. Moreover, top Latinists since 1866 have agreed that, contra Carrier, Fragment 2 belongs to Tacitus.