Who killed James?

Who killed James?
It’s not an easy question to answer. We all think we know who killed Jesus. No difficulty, of course, for the author or later editor of I Thessalonians. The perpetrators were his fellow Jews and the guilt, according to Matthew, lay on the Jewish people as a whole.
It is a libel that has since helped to generate enormous harm.
Most analysts agree that Jesus was convicted and executed by the Romans, notwithstanding asides on the hand-wringing Pilate or the preposterous account of the Jews as executioners in the Gospel of Peter. The Romans did it, but they had collaborators.
And these were the usual suspects. Not the ‘Scribes and Pharisees’, so roundly condemned in Matthew, but the chief priests (present and former High Priests) among the Sadducees who owed their pre-eminence and their wealth to the Romans (Mark 15, 3-11).
For the death of James, we have one apparently solid reference in Antiquities, the history of the Jewish people written by Josephus.
As described here, the prime instigators are in this instance the usual suspects – the Sadducee High Priest and his allies in the Sanhedrin – and the Romans (caught on the hop, while replacing their Judean procurator) are entirely blameless. And, of course, no one else is to blame either.
Hmmm… It is just all too easy. And it’s an account that does not entirely square with what else Josephus may have had to say, and what has survived of the shredding of texts originating from ‘the opposition’, Jews who survived and continued to support James.