My father had a hair trigger temper and was violently aggressive, prone to fits of black out rage. My mother and I had to walk on eggshells around his homicidally abusive ass. He's always confused fear with respect. The ravages of arthritis have made him physically frail, as he's also increasingly succumbing to age and dementia, but for as long as he felt capable of doing so, death threats have been his exclusive tool for threatening his family into doing his bidding. As purely evil a monster as I have ever heard of in existence, and that includes, all the Nazis, Stalin, Mao, Manson, Bundy and Dahmer. Being senile and frail with arthritis and age doesn't change that. He would be terrorizing his family with death threats and homicidal violence today if he could.