Correction: Octavian had others butcher anyone that may have been capable. Octavian himself was too busy hiding in a swamp or behind his friends' petticoats to butcher anyone. Of course, I'm sure there's a legitimate excuse for his gross cowardice at Philippi--maybe he was busy looking for his filial irae.
To me, Octaivan's swamp-mucking at Philippi is emblematic of his whole military career. Even as a thug, he was simply a cowardly, short-sighted opportunist, with his successes almost entirely confined to his use of force against the unarmed--the unarmed Senate, the unarmed men whom he proscribed, and the unarmed men at Perusia and Philippi who surrendered to
him. That he outlasted his competitors by this disgusting technique is true--but in a civil war, SOMEBODY has to be the last person standing. I take this is to be an achievement of rather dubious quality.
If there's a case to be made for any method in all this sneaky madness, it's going to have to be made after Actium. Before that, there's absolutely nothing in Octavian's early career that is even worthy of a Roman name (funny, it should be Caesar's!).
As far as I know, at least at the end of the Civil Wars, every Roman Nobile was trying to butcher every other Nobile (thug, if you like) who was not on his side.
In this disgusting Roman practice, Octavius was hardly original; he was only the most successful.
Most of his enemies (check my last previous post), senators or not, were hardly unarmed.
In a Civil war, obviously someone has to be the last person standing. The obvious question is: why Octavius? I suppose we are not pretending once again it was mere luck or that his ethical background gave him an advantage over his supposedly more scrupulous competitors.
Contrary to Caesar, he was indeed a coward, but hardly a short-sighted one, even at the pre-Actium era;; why do you think so?
And why "madness"? His butchering was not indiscriminate; on the contrary, his victims were very carefully selected, and the method behind such carnage is clearly discernable.