He was a descendant of King David. The begats are carefully listed and fully defined.
The Galileans culturally were very different from Judeans in their customs and traditions. This difference becomes important when interpreting Jesus’ parables.
There was a lot of splitting going on among hebrews and Jewish factions. Just like among Christian denominations today. Jesus was a Galilean. He was a Hebrew. He may not have been an Israelite. He was born far away from people starting to consider themselves Jews.
Today the terms Israelite, Hebrew and Jew seem synonymous. It appears that they were not synonyms at the time.