Your Grandfather's sad last moments reminds me of something we found out a few days ago.
My wifes JW grandmother died a few years ago in her late 80's. All the JW relatives live a few hours away and it was her non JW Grandchildren who watched out for her in her last years. As it happens, only one person was with her as she died and that was one of my Wife's non JW Cousins. We didn't know this before but this Non JW Cousin happend to mention the other day that poor Grandma was really terrified in the hours before her death and this Cousin couldn't understand why or what the grandmother was trying to explain to her.
We asked her what Grandma was saying and the cousin said " I'm not sure exactly what she was talking about but she was really upset and I didn't know how to help her. She kept saying something about how she wasn't sure if she was one of the other sheep and kept saying again and again, something about the number 144,000 and that she very very frightended to die."
My wife and I looked at eachother and knew exactly what was going on. Grandma claimed to be of the annointed after she was quite elderly but none of the JW family really took it seriously. Apparently she was having second thoughts of guilt about having partook of the emblems. Anyway it was distressing to find this out this kind and good woman died in such an agitated state. If one of the JW relatives had been there, they may have been able to comfort her and assure her that Jehovah would take care of her no matter what calling she had. Wanting to spare our feeilings, these non JW's relatives sheilded this information from the rest of the family who are all JW's. They didn't realize there was any JW significance, they just wanted us all to think Grandma had passed away peacefully.