MINORITY inside a MINORITY! (e.g.: ATHEISM in an EMIGRANT family)

Let's say we're in late 1920's in New York, USA. Suppose a 14 year old son in an just-before-3-month-arrived emigrant greek family, says to his parents: "Hey mom and dad, I am an ATHEIST. I don't want to go with you in the orthodox church anymore. I suffer down there. I want to find out things by science and knowledge, and I don't want to accept everything as a belief....". WOW for the emigrant parents!!! Should they try to persuade him to change
'back to orthodoxism" again or not??? Would this affect the COHESION of the poor family in the new-strange-unknown country they've been? Should they let him find things in his own??? CAN the parents look in the eyes of the other members (cousins-relatives-compatriots from Greece) of the slowly-formed-minority, when they go every Sunday in church?.... It is not so simple for anyone... Even for the little boy, even for the parents, even for the relatives, or even for the neighbour Americans.... We have the situation of a "Minority in a Minority".... What should have been done by anyone???? ..... I'm looking forward for your answers or comments......