I assume you mean the Jews who were directly effected by Jesus’ ministry
or those who knew them. Those who did not accept Jesus for who he said he
was did not fail to believe because of lack of evidence. Jesus said “Even
though you do not believe me, believe the miracles, that you may learn and
understand that the Father is in me, and I in the Father.” (John 10:38).
Jesus worked more than enough miracles and fulfilled more than enough
prophecies of the Messiah to prove his claim to be the promised Messiah.
One amazing example is that after Jesus raised Lazarus from the dead (John
11), of course most put their faith in Jesus, but some said “If we let him
go on like this, everyone will believe in him…. (John 11:48). They
decided to plot to kill Jesus to stop the miracles! Even raising a man
dead in the tomb four days was not enough for some.

The problem is not lack of evidence but hardness of heart. Jesus called
people to leave their life of sin, to humble themselves before God and
before men to follow him. This call for humility, for being teachable and
for repentance was more than many of the Jews were willing to do, despite
the overwhelming evidence. Is this not the exact case today? The vast
majority of people in our world today may take the name of Jesus, but
repentance is far from their lives. Do they lack evidence that Jesus has
authority to demand they give their lives to him? No. It does not come
down to evidence, but to hardness of heart. I pray that your heart is open
to the cross of Jesus as well!

John Oakes, PhD