Jesus said this about his enemies
I know that you do not have the love of God in your hearts.
I have come in my Father's name, and you do not accept me; but if someone else comes in his own name, you will accept him.
In reply Jesus declared, "I tell you the truth, no one can see the kingdom of God unless he is born again. "
No one can come to me unless the Father who sent me draws him, and I will raise him up at the last day.
Put simply unless God makes people born again they cannot recognise Him as He is. So it is not a question of proof but spiritual rebirth. If Jesus had appeared to the pharisees they would have just believed he was a ghost or a con man and tried to kill him.
When Peter a few months after Jesus rose again said plainly who Jesus was
"It is by the name of Jesus Christ of Nazareth, whom you crucified but whom God raised from the dead, that this man stands before you healed."
Their response was
"What are we going to do with these men?" they asked. "Everybody living in Jerusalem knows they have done an outstanding miracle, and we cannot deny it.
But to stop this thing from spreading any further among the people, we must warn these men to speak no longer to anyone in this name."
The question was not, wow, Jesus was the Son of God, but the people will believe these peoples message because of this miracle that looks outstanding, so we cannot stand against it, though we disagree with it completely.
If Jesus had stood before them it would have been no different.
When stephen said something similar a year later they responded like this
At this they covered their ears and, yelling at the top of their voices, they all rushed at him, dragged him out of the city and began to stone him.
They knew Jesus, they knew they had killed an innocent man, who said He would rise again, and His followers, timid empty people, now appeared with boldness and great skill before them declaring His resurrection and performing miracles by Jesus's power, yet they hated them.
Either they accepted the truth or they had to fight for survival, because only force would stop this movement. They chose to fight and rebel against God.
above are three articles that are providing their perspective on this subject.