Who is Yigal from The Source; a Novel and what is their importance?

Yigal is a twenty-six year old man living in Makor around 37 C.E. He operates an olive press and is married with children. Even though Yigal is just a poor commoner, he foresees what will happen if the Romans invade and develops a plan for stopping the Romans. The Jews lie on the road blocking their path and are prepared to die to keep statues out of the synagogue. The plan is successful.