Jesus the prince of peace Isa.9:6,7. didn`t come to bring peace on the Earth but to cause division in one`s household.Matt.10:34-37.
He said he knows his parents will not speak with him once they know his position even if he isn’t disfellowshipped or disassociates himself.
Let`s put the blame where the blame originates from.
I wish all the best for your nephew in the tough times ahead for him and hope he has the courage to forge ahead with his convictions.
It takes guts to do that at a young age.