They would reject him as taking just Jesus with all religious elements stripped away he was a socialist. Which makes me believe that people who do not believe in god but act in a way Jesus would have blessed are nearer to God than many people who visit church every week. And that is the christmas promise "Peace on earth to all beloved by God." Who may not even believe that God is there. If they do God's business, they are in. Which is to take care of those who need it. If you meet one of those and take care, you're in. God's business isn't done magically. It's done by people.