Well, I haven't been to the site yet, but will do so later on.
However, I will say this; theoretically it's true that nobody named 'Jesus' died on the cross. The name 'Jesus' is a fairly late anglicized translation of the Greek name 'Iesous.' The letter 'J' wasn't even in any known language before around 1400 AD. Nobody named 'Iesous' died on the cross either. Hebrews didn't give their sons Greek names.
The guy the New Testament was written about was named 'Yeshua' which is a name specific to the northern Aramaic dialect that was spoken in Galilee. In the southern district of Judea, the name was pronounced more like 'Yahshoo'. The Galileans used a more guttural 'Yeh' rather than 'Yah' and they also ended names in an 'a' sound if the previous letter was a vowel sound. In English, the name would actually translate out to 'Joshua.'
But absolutely no one can realistically say that "Yeshua never existed" because about one out of every five Hebrew boys was named that (or one of its variations) circa 1st century AD.
Whoever 'Yeshua' of the New Testament was, he did evidently exist according to the Babylonian Talmud which was written by the Jewish priesthood. The Pharisees despised him and called him every derogatory thing they could think of. The things written in Babylonian Talmud seem to be proof that he existed, for it seems to me that the Jewish priesthood would not have made so many hateful remarks if a man named 'Yeshua' had never lived nor began a religious movement that evidently threatened the Pharisee's take on things.
As far as I can tell, the crucifixion did indeed take place. In the Babylonian Talmud, the Jewish priesthood admits they called for Yeshua's crucifixion, are proud of it, and they celebrate the fact that they were the ones responsible for it.
There is to this day a great deal of controversy over what is written in the Talmud. Wikipedia discusses those arguments extensively;
Yeshua's story appears to have been immediately absorbed into various Sun god myths that were popular in the day, but that is to be expected and was simply par for the course. Throughout all of known history, anytime any man rose from the crowd, gained popularity and challenged known religious concepts, the priests of the sun god system always had the man killed and from that point on attempted to "absorb" that individual into the myths of any number of dying and resurrecting sun gods. And these same tactics have been used by various Sun god priesthoods since written history began.
The Egyptian legend of Osirus is a clear example of how the Sun god priests operate. Originally Osirus was worshipped in Egypt as a moon god. His religion was actually in competition with the Sun god religion promoted by the Heliopolitain priesthood in Egypt. Osirus was never even associated with the Sun god cult until AFTER he was murdered, at which point the Heliopolitan priesthood "absorbed" him into their religion, and promoted him as a sun god deity from that point on.
The exact same thing happened with the story of Christ. Clearly, Yeshua expected this would happen, because he said that "many will come in my name," and that his followers were not to be deceived by them.
Just like in Egypt, many in Jewish priesthood were Sun god worshippers and a passage found in Ezekiel makes this very clear:
"And he brought me into the inner court of the Lord's house, and behold,, at the door of the temple of the Lord, between the porch and the alter, were about five and twenty men, with their backs toward the temple of the Lord and their faces toward the east; and they worshipped the sun toward the east." (Ex 8:16)
The priests who demanded that Christ be killed were the very Jews who were taking part in worship the Sun god in the Jewish Temple. Evidently, Sun god worship had been going on for a very long time within the Jewish priesthood. There were sun god worshippers among the Jews that came out of Egypt at the time of the Exodus too.
John the Divine, who wrote the Book of Revelations during the 1st century, evidently already saw various elements of the Sun god system attempting to promote the concept that Christ was just another Sun god. And that's why John the Divine specifically used the numeral '666' to define someone who was an antichrist. By Christian standards, an antichrist is one who attempts to usurp the throne of Christ through deception. '666' was a very well-known number throughout the near and Middle East. It was the sum of all the numbers in the Magic Square of the Sun and back in those days, everybody and their uncle knew the number represented the Sun god.
Magic squares are blocks of numbers that were typically carved into the faces of talismans and amulets by the rich and poor alike throughout the Middle East. If you do a search on "Magic Squares, 666" you'll find plenty of articles on the subject. The practice of Magic Squares was brought into the Middle East from India, and from there they can actually be traced back to the Chinese. Magic Squares were one of the most popular forms of symbolic magic ever used in the Middle East.
Most people seem to think that '666' must refer to the system of numerology or the 'gematria' used by the Greeks and later on by the Hebrews. But that's not the case. The number was famously known and is very specific to the Magic Square of the Sun god which was actually the most popular Magic Square ever used as a talisman.
Typically, every "Jesus never existed" website that I've been to inevitably justifies their position by comparing the New Testament Christ to various known dying and resurrecting Sun gods. But those sites never point out that Yeshua said "many will come in my name" and not to believe them. Furthermore those sites never point out that John the Divine basically called the Sun god the antichrist (one who pretends to be Christ) when he specifically used the numeral '666' to describe an antichrist, because it was famously associated with the Sun god.
So, the "Jesus didn't Exist" sites only present PART of the evidence. I've never seen one of them actually present all the facts.
I don't much like fundamentalist Christianity; it turns me off and in a big way. However, fundamentalist Christianity is based on the dogmas and doctrines established by the Church of Rome. Anybody who has ever studied what the Church of Rome did recognizes them as the Church of Sol Invectus, and that's one of the names they actually went by in antiquity. They didn't try to hide that fact. The Church of Rome took every single myth and story concerning the various Sun gods and wove those stories into their church doctrines about Christ and made them "thee law."
Furthermore, that church killed everybody who disagreed with them and most of the people they killed were not pagans; they were the early Christians who were calling the Church of Rome on their lies and BS.
It was that church that specifically set about with a very violent agenda that intended to portray Christ as a Sun god from the get go. That church made absolutely certain that every single Christian 'holy day' could be traced back to one of the dates cherished by the various sun god cults.
Virtually every "Jesus didn't Exist" site that I've ever read justifies their position by stating that Christ was nothing more than just another myth of still another dying and resurrecting Sun god.
And that's exactly what Christ's enemies intended to make people think.