It is so sad that parents choose to distance themselves from caring, thoughtful people who happen to have merely a religious difference of opinion.
This letter would make sense to anyone not trapped in a cultish religion. But probably the letter would be read over quickly and not really have any impact other than to further push the parents and child apart. I know I'm not saying anything new here.
I wrote my letter (shorter, and not quite so thorough) to my parents. Of course it didn't get through to them. Nothing does. They're loyal to the Watchtower!! That loyalty is much more important than family love. To them. Because they're robots for Jehovah. Sad.