The claim of the Jerusalem Church with thousands of Jews is found in Acts of the Apostles. And not only were there thousands of Jewish believers but they were also persecuted by a character called Saul whose name was suddenly changed to Paul.
Now, if there was never any Jerusalem Church, if there were no Jewish believers of Jesus of Nazareth in the time of Tiberius, Gaius, Claudius and Nero then the NT stories about Jesus of Nazareth, the apostles, the thousands of converts and Saul/Paul are reduce to fiction.
Philo, a Jewish writer of antiquity, a contemporary of Tiberius and Gaius, mentioned events of the time, but although writing about Pilate he wrote nothing about a new religion where Jews were worshiping a Galilean as a God.
It is extremely important to understand the significance of the writings of Philo because this writer claimed that Pilate placed some “gilt shields” in the palace of Herod in the Holy City to honor Tiberius but the Jews when they found out went to Pilate to have them removed.
On Embassy to the Jews XXXVIII
.... the people, putting forward the four sons of the king, who were in no respect inferior to the kings themselves, in fortune or in rank, and his other descendants, and those magistrates who were among them at the time, entreated him to alter and to rectify the innovation which he had committed in respect of the shields[; and not to make any alteration in their national customs, which had hitherto been preserved without any interruption, without being in the least degree changed by any king of emperor…………...they cried out: 'Do not cause a sedition; do not make war upon us; do not destroy the peace which exists. The honour of the emperor is not identical with dishonour to the ancient laws; let it not be to you a pretence for heaping insult on our nation. Tiberius is not desirous that any of our laws or customs shall be destroyed…
As it can be seen in the writings of Philo the Jews did not worship men as Gods--not even the Emperor of Rome --in the very time of Pilate and the supposed Jesus of Nazareth.
And this event is also corroborated in the writings of Josephus where the Jews refused to worship Tiberius as a God in the time of Pilate and would rather die.
Antiquities of the Jews 18.3.1
…..Pilate was the first who brought those images to Jerusalem, and set them up there; which was done without the knowledge of the people, because it was done in the night time; but as soon as they knew it, they came in multitudes to Cesarea, and interceded with Pilate many days that he would remove the images; and when he would not grant their requests, because it would tend to the injury of Caesar, while yet they persevered in their request, on the sixth day he ordered his soldiers to have their weapons privately, while he came and sat upon his judgment-seat, which seat was so prepared in the open place of the city, that it concealed the army that lay ready to oppress them; and when the Jews petitioned him again, he gave a signal to the soldiers to encompass them routed, and threatened that their punishment should be no less than immediate death, unless they would leave off disturbing him, and go their ways home. But they threw themselves upon the ground, and laid their necks bare, and said they would take their death very willingly, rather than the wisdom of their laws should be transgressed..
Both Philo and Josephus show that it would have been virtually impossible that there were thousands of Jews in the time of Pilate who would worship a man as a God much less a dead man who falsely claimed he would resurrect on the third day.
The teaching that a man called Jesus should be worshiped as a God by Jews was blasphemy ---a capital crime and punishable by death.
https://en.wikipedia.org/wiki/List_of_c ... _the_Torah
In addition, there is no known prophecy in Hebrew Scripture where it is claimed Jews should worship a dead man as God.
Based on the evidence the story in Acts of the Apostles with thousands of Jews worshiping a dead Galilean as a God and that Saul/Paul persecuted them is utter fiction.
It is not only that there were no Jewish worshippers of the dead Galilean but there was also no persecutor --call him Saul or Paul but he was nothing at all.