You are confusing His humanity with His deity. As to the flesh, He is descended from the line of King David. Both the messianic prophecies and the genealogy of Mt. 1 make that clear. As to His deity, He could not be further removed from Judaism - the religion they invented, and which corrupted the revealed truth of the OT.
Read the gospel records again and note His disputes with His 'religious' opposition of the day. There is barely a subject from which they emerged unscathed after crossing swords with their own messiah....who, don't forget, they also rejected. That's how wrong they were about their own Scriptures.