True, but I've un-chosen a few.
The only "unchosing" I can think of was with a college roommate and very good friend who at the wise age of 18 (this was the late '70s) decided to become a full-fledged vegan. It was a political statement that it was morally wrong to exploit animals for our own existence. She had many other rationalizations (environmental, health) to justify it. The idiot has stubbornly hewed to it well into her 50s, with elaborately self-deceptive rationale.
When I saw her subject her own baby to it, her own little kid, poor starving little monkey -- he clung to her like a skinny little monkey with bleary eyes -- I had to turn away. I unchose her, and it was mutual. She had to know I'd lost all respect for her. When someone tells me they are vegan, even when they're young, they drop about five notches in my book.
Those relatives must have some loud politics for you to unchose 'em!