From the details you provided me with, I very much agree that Mucianus looks like an alter ego of the Apostle Paul. At the onset of the Revolt the strategy was not to suppress it, but to fan it into full flame. Mucianus, as with Paul, was an instigator, not a terminator, and definitely not a mediator for peace. Paul was intent on bring a terrible "Day of Judgment" upon the Jews.
In his plan to wrest the throne from Nero, Paul initially took the young "John Mark" under his wing. The name John Mark is an obvious reference to Marcus Junius who organized the assassination of
Julius Caesar. The name John Mark reveals that he was the one who assassinated Nero, and therefore to be equated with Epaphrodites, the actual assassin.
Epaphrodites however betrayed the first attempt on the life of Nero. This seems to be reflected in the parting of ways between John Mark and Paul in the Book of Acts. In the earlier history, Marcus Julius was also reluctant to perform the "duty", but eventually was persuaded. Epaphrodites likewise later followed through with the appointed role, and the story circulated that Nero actually asked Epaphrodites to help him die! The aged and ailing Julius Caesar probably did want to be Osirified, but Nero certainly would not have, at least not in the prime of his life.
We are beginning to see what Paul meant when he threatened to hand his enemies over "to Satan for punishment". He thoroughly relished the roll of "holy hit man". Mucianus, as you noted, wasted no time in securing Rome after the death of Vitellius. (We must also consider Vitellius to have been a bonified royal person. This would have been a prerequisite for anyone making a play on the throne. I haven't explored his true identity within the Julio-Claudian/Herodian house, but it's something to keep in mind.)
The fair-haired boy Galerianus was taken outside the city and his blood shed without pity (as an Eliezer), and as part of preparing the way for Vespatian (as a new Moses leading refugees from Jerusalem) and Titus (in the role of Joshua). Perhaps Paul had learned something though from the back-lash of his more public take-down of James the Just/Stephen. Galerianus was put away just as ruthlessly, but much more discretely.
The Book of Acts amounts to "damage control" regarding the reputation of Paul. He was a cold-blooded killer. The precedient for rescuing his image comes from one his most important role models, Pausanias/Artabanus of the Persian Period, who was also a confirmed homosexual, flamboyant liberal, and a double-dealing, murderous scoundrel. Pausanias also died in ill-repute, yet after his death the court historians undertook a deliberate program of rehabilitation for him. Similarly, the Book of Acts and the Pauline Epistles ascribe to him the sterling character of another of Paul's role models, Aemillius Paullus, who was so profusely praised by Plutarch.
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