There is nothing that would get me back at this point. I know this sounds strange to a JW, because at this point you cannot imagine how a person could say that.
A family member went apostate and has turned his back on Jehovah
By this statement you have made the assumption that when a person leaves the organization, he has left Jehovah. Can you separate the two? Or realize that the Organization does not = Jehovah.
Secondly, the only thing many here have done is what you and other JWs ask other people to do every time you go door to door. And what is that? EXAMINE THEIR RELIGION.
I can’t be sure but since your family are all JWs, you sound like a person who may have been raised in. Have you ever examined your own religion? Have you ever been allowed to examine your own religion? You have limited knowledge of other religious groups through the eyes of the WT and your JW background, but have you ever read anything concerning JWs or other religions through anything but the WT?
Other questions, do you really believe your brother prefers and enjoys the relationship he has with his family now? If he is going through this much of an effort, is it possible that he learned some things that his conscience and personal integrity would not allow him to accept anymore? If it is that important, and you do have the Truth which should stand up to anything, can you at least hear him out?
I was raised in myself, but intellectual integrity would not allow me to accept any longer what I knew to be false. That is not truth.