My fam have been great with me compared with this BS.
I just got back from OS (remember me from the bbq crumpet?)
told my old man i cant see myself going back to the truth anytime soon and its not because i wanna live in sin through weakness, but ive learnt a few things about the WBTS that make me doubt they are who they claim to be. I said Id let him know if he wants to hear it he said yeah tell me, so i told him about 'quotes' and his embarrassing site and the UN issue and left it at that. hopefully he'll let it stew for a while. i see light, it seems possible. I am grateful, my situation is much better than others it seems.
So my humble advise, let him (and perhaps also an elder or 2) know that you dont have any intention of coming back and that shunning you to this extent is not going to help in any way.
Good Luck.