These grandpeople had to have been using something else 10 years ago to communicate with their grandkids... and then over these 10 years then simultaneously learned how to use FB, forgot how to use that other technology they'd used their whole life, and also lost the ability to learn how to use any other communication technology?
Not impossible with cognitive deterioration, but probably a lot more rare than this excuse.
If my grandparents were still alive today I'd just tell them that Facebook was controlled by the Democrats and we should use X,Y, or Z instead of effectively donating to Obama's campaign. They'd have deleted the app and gone back to text messages and phone calls by the end of dinner.
This blows my mind. I mean having Whatsapp implies one has a phone which implies one can receive SMS messages or God forbid, a phone call.
Then just let them be upset. Try to explain it to them, but if they don't accept it, then let them be upset. If you back down they will never ever learn it. Never. Not a chance.
My parents are as paranoid as I am (grew up in a US enabled dictatorship) so it was easy to get them to use Signal. If they weren’t so cool, I’d use FB or WhatsApp
But my aunts and uncles and cousins (who, ironically also grew up in this dictatorship) laugh and use Facebook.
That’s cool. I don’t talk to them often. They know I love them. And they know I won’t use FB.
You wouldn't be cutting them off. They'd be cutting you off by refusing to use any of the myriad other communications methods.