NANTIQUES:
Congratulations on getting your family member back.
If it were me, I would have a big Holiday party and invite a lot of people (neighbors and relatives) so he would not be the focus of anybody’s attention - like say at a dinner. He would just be a ‘guest’. (Of course, I would give certain people a heads-up who knew about him not to mention any religion and to act normally.) I would think somebody exiting a stifling religion that tried to limit his association would be starved to be around people who are not judging him and just observe how normal people act.. Let him mix and mingle and get a little holiday spirit. That’s how I would do it. Just an idea.