Why didn't Jesus join the Zealots and fight Rome?

The short answer

The Gospels never tell of rebels asking him to join them. They do show him turning away from force. When a crowd wanted to make him king, he walked away from them. One of his twelve closest followers was called Simon the Zealot.

What the record says

Resistance to Rome was real in Galilee. In the book of Acts, a teacher named Gamaliel recalls a rebel from Jesus’ own region:

After this man, Judas of Galilee rose up in the days of the enrollment, and drew away some people after him. He also perished, and all, as many as obeyed him, were scattered abroad.

Acts 5:37

The enrollment was a Roman count of the people for taxes. Men who wanted Rome gone would have been part of the world Jesus grew up in.

When Luke lists the twelve, one of them is “Simon who was called the Zealot” (Luke 6:15). The word can also just mean zealous, and historians are not sure whether Simon belonged to a rebel group. The Zealots as an organized party show up most clearly in the war with Rome, decades later.

After Jesus fed a large crowd, John says:

Jesus therefore, perceiving that they were about to come and take him by force to make him king, withdrew again to the mountain by himself.

John 6:15

John does not give his reason.

How Son of Man tells it

Son of Man is a novel. It imagines the years the Gospels skip. In the novel he goes by Yeshua, the name his family would have called him. In chapter ten, The Zealot, Yeshua is seventeen. Recruiters come to Nazareth with the caravans, and half the room stands up to join. Yeshua stays seated. A grieving moneylender offers to clear every family debt if he will speak for the cause, and even his mother asks him to think about it. He tells the village committee no. That night, on the ridge, his brother James asks him why.

“I want them to know the Father,” he said. “All of them. I don’t know yet how that work will begin. But I cannot begin it by asking them to kill.”