My 85 year old grandfather's twin brother died a few months ago, and my grandfather hasn't even been told yet (his brother moved to a different country, so the two of them hadn't seen each other in years). My mum and uncle say that it's for his own good, that knowing his twin died might stress him out so much that he might die as well. Also, he lost his wife to kidney disease five years ago, so he's still hurting over that.
This decision to keep him in the dark really bothers me, because I think he deserves to know that his brother is dead. Not only that, but what if he finds out a lot later that he had been lied to, and gets even more upset than he would have been if everyone had been upfront with him?
Am I right to feel this way, or do you think my grandfather really is better off not knowing that his twin brother is dead?
This decision to keep him in the dark really bothers me, because I think he deserves to know that his brother is dead. Not only that, but what if he finds out a lot later that he had been lied to, and gets even more upset than he would have been if everyone had been upfront with him?
Am I right to feel this way, or do you think my grandfather really is better off not knowing that his twin brother is dead?

Leave it be. It may not seem fair but whoever said life is fair?
Ignorance is bliss in this case.
doesnt anyone agree with you? even if he does die, does your family really want his last thoughts to be "what douchebags"...thats what I would be thinking if it were me.
Why don't you tell him? Well, actually I'm sure that would get some people mad at you...
If someone kept a secret that important from me, I'd hate them forever.
They should tell him and hope for the best.