Hello, I am sorry for your pain. What you have to understand about this jw religion is simply just because he was not practicing the jw religion for so many years, doesn't mean he doesn't have the indoctrination of it still influencing him. He is what we call POMI (physically out mentally in)
Unfortunately I'm sure he has drawn the line in the sand that he wants you to study and become a JW. A lot of jws do not fathom unconditional love. The religion demands acts of service to demonstrate devotion. So much of the jw belief system is similar to high control groups and cults. Steve Hassan has a lot of great books that discuss how to help loved ones free themselves, bottom line he has to want to mentally free himself though!