Post resurrection appearance of Jesus - Argument for
Having debated the subject on a mainstream debate site, the main evidence for the resurrection appears to comes from the argument that a total of 513 witnesses witnessed the post resurrection appearance of Jesus, and why would they lie? Et cetera.
Biblical accounts - Wikipedia
The earliest report of the post-resurrection appearances of Jesus is in Paul's First Epistle to the Corinthians. This lists, in chronological order, a first appearance to Peter, then to "the Twelve," then to five hundred at one time, then to James (presumably James the brother of Jesus), then to "all the Apostles," and last to Paul himself. Paul does not mention any appearances to women, apart from "sisters" included in the 500; other New Testament sources do not mention any appearance to a crowd of 500. There is general agreement that the list is pre-Pauline – it is often called a catechism of the early church – but less on how much of the list belongs to the tradition and how much is from Paul: most scholars feel that Peter and the Twelve are original, but not all believe the same of the appearances to the 500, James and "all the Apostles".[note 2]
I don't think there is any hard factual correct response to the statement above, it really is a matter for debate.
Jesus of Siberia
One could perhaps debate that currently we have a cult leader named Vissarion who claims to be a reincarnation of Jesus and he currently has more witnesses and followers than is attributed by Wikipedia to Jesus, and just because there are 4,000 of them living in his commune that testify to his authenticity does that mean we all automatically believe them just because there are 4000 of them and we do not know why they all believe what they do?
Vissarion has gained more than 10,000 followers—4,000 of whom live in clustered cabins and yurts in southern Siberia.