Terry,
I read this sad story on your original post but I had no time to express my deepest sympathies to you. The saddest part though is that it seems the friendship was only one way - you towards him -at least for the last several years. For him the cult was more powerful than his friendship towards you. When you leave the cult you often get to experience for the first time what real, non-conditional friendship is. But while in the cult, this is impossible. After 50+ years I started reconnecting with family members and old friends who have greeted me with open arms, without resentment. I know you would have been there for him because that's what real friends do.