I'm afraid that's still not hard evidence and it would be thrown out of any court, reliable eyewitnesses from around 2000 years ago are not proven reliable and back then even people who might be considered healers had extremely limited knowledge to what a doctor has in modern times, that's if he even was a healer, we don't really know for certain in the same way as we don't even definitely know that Jesus existed.
Saying that millions of people have met with "Him" on a spiritual plain is also entirely pure speculation that is not proven and would be thrown out of any court of law.
I was a paranormal investigator for quite a few years from 1996 and from experience I know that there's things that cannot be explained by normal science, I've even recorded some incredible
E.V.P. on more than one occasion that's specifically answered a series of questions, one was a really clear women's voice when there were no women in the room, at the time I suddenly heard lots of blatant knocks and fidgeting sounds around me which I've heard a good few times when there's paranormal activity and I've experienced some incredible things over the years. Sadly now there's nothing but fake or grossly exaggerated TV shows like Ghost Adventures which upsets me, I know that you have to be very patient to obtain evidence and often you could spend all night in an alleged very haunted location to get absolutely nothing, yet on shows like this they gain evidence that you'd be lucky to get in 6 months of investigating every few minutes, shows like this are making a mockery of the paranormal and so are most of the very unprofessional public "ghost hunt" groups that didn't exist in the 1990s that charge to try to frighten people, investigating the paranormal is not about frights. I will even talk unprofessionally and go as far as to say that I have seen evidence of what people might call spirits and twice I've had the honour to blatantly witness what certainly appeared to be a full apparition that many people would call a "ghost" (a non conscious replay of past events, or another theory is there's a crack in time and we are seeing the reply as it happens), they're extremely rare because over years of investigations and 100s of hours I've only seen 2, both experiences lasted no more than 5 seconds and on both occasions I thought I was observing a real physical person, before I could react they faded away. I returned to the same location of one sighting repeatedly and spent many many hours there to get absolutely nothing, the same woman I very clearly saw walking in a mourning dress has allegedly been witnessed by numerous people over the years in that location.
I however believe that spirits can lie just like living humans and how do you truly know the person was who he claimed? I've even allegedly astral projected outside my own body and seen myself, while out I've even pushed my astral body's hands through a wall and felt the texture inside, but I also suspect that you can create things that you're thinking while in spiritual plains, similarly in lucid dreams some people can control what they see or even control people that appear, it doesn't necessarily mean that this person was even a true spirit however and if enough people travel to this plain and want to see a particular thing or person so much they probably will. As I said even if this person was a spirit it doesn't meant they're a genuine one. Another theory is a combined number of people thinking the same thing can allegedly create things in the spiritual plain, but it's all speculation. Many Spiritualists believe they have at least one spirit guide, they try so hard to meet them that many achieve it at first while meditating and often visualising, they see this instead of "Him" as you described, similarly however I'm sceptical as to how genuine this is even though they actually see this person. In other words people tend to see and often communicate with what-ever they personally believe while in that altered state of consciousness.