wow
I heard a speech from a Rav about OTD Kids given at the Agudah Convention.
He said that even OTD kids for the most part have some connection. He metioned a girl who was pregnant from a non jewish man, but still wanted her new daughter named in Shul.
Maybe he doesnt want to daven. Maybe there is something else. Right now I think its best to concentrate on those mitzvos he wants to do and not those he doesnt want to do