It's really not that hard to figure out when you read what is printed in the damn scriptures.
The Gospel of John sets it out perfectly.
The Pharisee killed Jesus. The Jews weren't so much a religion or race as they are today, but a sect who lived under the laws and customs of Jerusalem - itself a city-state that was part of a trifecta between Rome, Egypt, and Jerusalem.
The Pharisee claimed that the Jews were the rightful followers of God and that Jerusalem would come to rule over all things. Obviously, Rome insisted otherwise and was more than capable of delivering on that point - much to the chagrin of the devout. The Pharisee would preach about "the coming glory of God" - which incited rebellion among the public. It was expected that the messiah would be a warlord who would overthrow Roman rule/authority. The more things change… Eh?
Violent rebels were a dime a dozen in the time of Jesus, and this is reflected in the temptations in the wilderness, as well as the visit by the Wise Men, where Jesus bluntly states that those who live by the sword also die by it. This was because he saw the nearby town, which housed a rebel leader, get roflstomped by the Romans. He knew that it was a fool's errand to stage any kind of armed rebellion.
Jesus was also descended from King David, and his father contracted to work on the Temple Mount - they were connected to the reality of how nations worked. Jesus knew well, growing up, that the Pharisee owned Jerusalem and they were using the whole of the theocracy to run their own private slave camp, effectively. The Pharisee were inciting rebellions and brokering with the Romans. Worse, they would also work to frame political and business competition.
When you run down the powers that be behind Emperor Constantine, it becomes more obvious why it was Rome first sought ton destroy Christianity before suddenly adopting it as their own religion and effectively creating the pope as an imperial seat over a re-envisioned Rome.
The Protestant Reformation happened as a direct consequence of the printing press. Catholicism was nearly destroyed by people being able to read the contents of scripture on their own, and they immediately realized that the catholic church was nothing more than the money changer outside the temple - who Jesus had a conniption fit over and chased people down with whips.