Where did the Jesus myth come from?

[FallentoReason]

Is this a later...new wine into old wineskins, addition to the Gospel?

As Jesus walked beside the Sea of Galilee, he saw Simon and his brother Andrew casting a net into the lake, for they were fishermen. “Come, follow me,” Jesus said, “and I will make you fishers of men.” At once they left their nets and followed him.
Mark 1:16-18 (NIV)


Fishers of men?
What men? Jews? Gentiles? Samaritans? Roman tax collectors?

To answer that, we need to understand where 'Mark' copied from to construct this bit of Jesus' life.

Jeremiah 16:16
Behold, I am sending for many fishers, declares the LORD, and they shall catch them. And afterward I will send for many hunters, and they shall hunt them from every mountain and every hill, and out of the clefts of the rocks.

Only one of two places in the OT where this metaphor is used.