Where was he allegedly born? Bethlehem in Judea.<quoted text>
It's logical to assume Jesus was ethnically a Yehudim, i.e. a descendant of Judah, but he resided in the the Galilee not Judea, therefore he was a Galilean not a Judean. The word "Jew" was used describe a person of a particular religion and is derived from the word "Judea", the geographic place where that particular religion was thought to have originated The word "Yehudim" denotes ethnicity, i.e. the blood line descendants of Abraham through the tribe of Judah. The words "Jew" and "Yehudim" are no more interchangeable than the words "Baptist" and "Mexican", bubba.
Why did Joe and Maz need to return to Bethlehem? The fictional Roman census.
So Joe and Maz returned to the town of Joe`s birth, so it`s safe to say Joe was a Judean.
"Many of the people of the land mityahadim became Yehudim(Judeans/Jews) because the fear of the Yehudim fell on them." ~Esther ch.2 vv. 5-6.
So what Esther is saying is that they changed their ethnicity?