he is getting old and he will die because that is what happens to human beings. THAT IS NOT YOUR FAULT. He had wrong expectations and that is not your responsibility. They refuse to communicate with you and you are causing stress for living your life on your terms.
Hard to muster up any sympathy for that kind of nonsense.
Send him a sympathy card about how much you regret that he was under the illusion that he would never grow old and die.
Geez.