Sorry to hear your story Julia.
You and your family can and will make it through.
Unfortunately, in my opinion (and experience), half of the elders co's etc are just on a power trip.
In reading crisis of conscience you can see that it goes right to the top. The loving elders often give up and resign or leave the borg altogether.
I find your letter very touching and kind. I do hope your parents will listen.
Good look.