All Jewish sources treated Jesus as a fully historical person

At Bible History Daily, Lawrence Mykytiuk wrote,

As far as we know, no ancient person ever seriously argued that Jesus did not exist.33 Referring to the first several centuries C.E., even a scholar as cautious and thorough as Robert Van Voorst freely observes, “… [N]o pagans and Jews who opposed Christianity denied Jesus’ historicity or even questioned it.”34

Nondenial of Jesus’ existence is particularly notable in rabbinic writings of those first several centuries C.E.: “… [I]f anyone in the ancient world had a reason to dislike the Christian faith, it was the rabbis. To argue successfully that Jesus never existed but was a creation of early Christians would have been the most effective polemic against Christianity … [Yet] all Jewish sources treated Jesus as a fully historical person … [T]he rabbis … used the real events of Jesus’ life against him” (Van Voorst).35

Thus his birth, ministry and death occasioned claims that his birth was illegitimate and that he performed miracles by evil magic, encouraged apostasy and was justly executed for his own sins. But they do not deny his existence.36

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