Judaism for the most part does not question that "Jesu" was a historical person. Josephus and other sourses and writtings (Toledo Yeshu) proclaim that he existed.
Judaism rejects Jesus because of his claiming to be THE SON OF GOD and because they do not believd that he was the Messiah because modern Judaism does not belived that there is any need for the messiah to hvae to come again. When he comes ,that is it. Judaism teaches that the Messiah is a human being not from heaven.
The Nt challenges all of that and so does the Christological perspective of the OT. It is a matter of fact that Jesus existed and jews and everyone on the Planet earth is foreced to accept that every time they write the year of our modern era based on Jesus' birth, like it or not.
Toledo Yeshu, a jewish litterary work, attributes Jesus miracles to misuse of the divine name.
All this considered, Jesus said he would return according to what is written in the NT and the Christtian esplanation of the verses in the OT relating to the Messiah comming siiting on a ass and comming in the clouds of heaven, meaning that the messiah would have to come 2x to "fulfill" the verses.
I am not teaching here, only relating information that is stated.