During the 1st-century over 500 eyewitnesses attested to the resurrection of Jesus Christ.
Actually, one man *claimed* there was 500 witnesses.
There is no historical account of it being disputed, and it was not just one man that witnessed His resurrection. Peter, John, James, and other NT writers speak of witnessing the resurrected Christ.
Matthew -
and coming out of the tombs after His resurrection, they entered the holy city and appeared to many.
Mark -
Mark 16 records Mary Magdalene, Mary the
mother of [
a]James, and Salome witnessing the empty tomb and are told,
"7 But go, tell His disciples and Peter, ‘He is going ahead of you to Galilee; there you will see Him, just as He told you.’”
Luke -
just as they were handed down to us by those who from the beginning were eyewitnesses and servants of the word,
Mary Magdalene, Joanna, and Mary the mother of James; also the other women with them reported the empty tomb and spread the news to the Apostles. Later on that very day two disciples meet the resurrected Christ on the road to Emmaus.
13 And behold, on that very day two of them were going to a village named Emmaus, which was [g]sixty stadia from Jerusalem...31 And
then their eyes were opened and they recognized Him; and He vanished from [
o]their sight.
They tell this to others and while doing so Christ once again appears to the group.
36 Now while they were telling these things, Jesus Himself suddenly stood in their midst and *said to them, “Peace be to you.”
John -
John 20 records the resurrected Jesus appearing to the disciples and later to Thomas.
19 Now when it was evening on that day, the first
day of the week, and when the doors were [
b]shut where the disciples were
together due to fear of the [
c]Jews, Jesus came and stood in their midst, and *said to them, “Peace
be to you.” 20 And when He had said this, He showed them both His hands and His side. The disciples then rejoiced when they saw the Lord...26 [
f]Eight days later His disciples were again inside, and Thomas
was with them. Jesus *came, the doors having been [
g]shut, and stood in their midst and said, “Peace
be to you.” 27 Then He *said to Thomas, “Place your finger here, and see My hands; and take your hand and put it into My side; and do not continue in disbelief, but
be a believer.” 28 Thomas answered and said to Him, “My Lord and my God!” 29 Jesus *said to him, “Because you have seen Me, have you
now believed? Blessed
are they who did not see, and
yet believed.”
Acts -
Acts 1:2 until the day when He was taken up
to heaven, after He had given orders [
b]by the Holy Spirit to the apostles whom He had chosen. 3 To [
c]these He also presented Himself alive after His suffering, by many convincing proofs, appearing to them over
a period of forty days and speaking of things regarding the kingdom of God. 4 [
d]Gathering them together, He commanded them not to leave Jerusalem, but to wait for [
e]what the Father had promised, “Which,”
He said, “you heard of from Me; 5 for John baptized [
f]with water, but you will be baptized [
g]with the Holy Spirit [
h]not many days from now.”...
Peter -
Eyewitnesses
For we did not follow cleverly devised tales when we made known to you the power and coming of our Lord Jesus Christ, but we were eyewitnesses of His majesty.
Then you have Paul's Damascus experience and I could probably cite many more recorded Scriptural instances, so you point does not meet the evidence of Scripture presented by many authors.