While I understand your frustration, your response to him seems a bit uncalled for and if he's on the verge of death, you may want to make amends. That, of course, is merely a suggestion. That's not the topic though, so on to the topic. I'm sorry to hear this

If I can suggest anything, keep in contact with your dad and be respectful; you don't want to make matters worse. Perhaps in time, he'll grow on the idea. Nonetheless, keep moving onward and again, I'm sorry to hear.