I'm so sorry for all who have gone through this nonsense - and it really doesn't make any logical sense at all.
I'm VERY fortunate to have never had family in the org. Losing my friends was bad enough - having them think I am now being led by Satan is horrible, but we will all survive, not on our own strength, though.
I had talked to the PO and CO about my 'problems'(they called it) with shunning, the UN/NGO and Silent Lambs... all lies! ... and evidently they were just going to let me 'fade' while I wait on Jah for answers(which truthful answers He has already given us btw). And they made sure that I'd not talked to anyone in the cong. about my 'problems', which I hadn't at that point. They said some things, verbatim, that your dad repeated - it's the inculcation of the WT - and they have it memorized. It's in their heads, but hopefully it's not etched in their hearts - there IS hope. I hope.
The words of your father echoed the same words my best 'friend' - laid on me after I told her I just can't attend the meetings with her... I haven't been there for 4 years, but all of a sudden she wanted to 'save' me. I was not cautious with the things I said, as I knew she and I shared an unconditional love and friendship... I should've gotten the hint when, in our conversations I mentioned 'the spirit of Christ' and she looked instantly smug and haughtily proclaimed - "That's not in MY Bible!, like she'd just defended herself against Satan... yes, I ASS-U-MEd way too much. "Thank you very much for ruining our friendship! I can't even be around you anymore because you don't even worship the same God as I do." Now I am 'not of the same sort'... Jehovah is only found within the walls of your nearest KH ya know... What a narrow view and mind-set. And I subscribed to it for too long...
The day after my 'friend' screamed at me how disgustingly demonized I was - she called. I first thought - oh, wow, she's re-thunk it... Well, she'd been thinking alright - that I should contact the PO, "it's only fair", and let him know that I no longer wish to be called a Jehovah's Witness. How nice of her to worry so and take on my conscience as her own - how loving. It really upset me for several days - another fly in the ointment, as I was sure she was going to 'tell'. But that was a month ago and I haven't heard another word. I felt like I was being forced to write 'the letter', but now I'm calmer and think - let them throw me out of the synagogue if that's what they wish, I won't bow to their 'theocratic' crap any longer. If I am df'd they'll have to do it 'in absentia' - without me. There will be no letter for their files to prove how righteous they were in ousting me. And I would love to threaten them with a lawsuit for slander if I hear I'm an apostate... but oh, well... whatever..
Someone had some very good advice - forgive them all and pray for them because they are blinded and don't see what they're doing. Forgive and forget is much easier for me than you, dear sis. It's your parents - it will be very very hard to find yourself separated from them, from their love and support. My heart goes out to you - it's the saddest scenario I can imagine. But... the light at the end of the tunnel is Christ. Stay close to Him and our Father, immerse yourself in the Word - take in all the love they have ASSURED you of, as a child of God. Your comfort will come from above, as you well know, and every tear will be wiped away, as every cry is heard.
Who knows - maybe it's God's plan that their ears and eyes will be opened to 'the big picture' - and you may have a starring role in that plan. Pray, dear one, and don't let your own heart be hardened by anyone's callous attitude. It's possible that, like us, their attitude will be changing for the better because some little thing you said really sunk in and got them thinking. With God all things are possible, and through Christ, all God's promises are "Yes!"
My very best wishes to you, Ingenuous. You'll be in my thoughts and prayers.
Peace and love... Peacebaby