Some people are toxic people and should be avoided when possible. If someone comes over that you can't deal with, then just don't let them into your home. If they continue hanging around outside tell them just once from a window--NOT from the door--to leave or you will call the police. This gives them polite and official notice that they have no biz being there and should leave. If they are still there after five minutes, or keep knocking on the door, call the police. This also applies to toxic relatives. For the person who's father was tormenting the cat, or for any other bad relatives, do not let them into your home. If you are living with them, try to move out. You are never under any obligation or law to hang out with toxic relatives or any other toxic people, unless forced by financial or health reasons to live with them.
My own father is not the nasty torment the cat kind of bully, but he is the sort of "he knows best" and "if I would only do what he says" kind of bully. On the good side, I don't live with him, on the bad side, I rent my trailer home from him. I can't afford to pay what it would cost to rent from someone else. He gives me a price break on rent. Fortunately, he is usually busy with things of his own to do, and lives in another town, so I usually only see him about once a week during the warm months. My father and step-mom spend the cold months down south, so I get a break from the constant attempts to make me turn into a normal person, and a social butterfly. I am not anti social, just non social. I am an introverted hermit type, and have no interest in being social and I'm not any good at it anyway. My father is an extrovert who thinks introverts are either miserable unhappy people who want to be social, or are mentally ill nut jobs, so naturally he keeps trying to "fix" me. I am in my early 50s. You'd think he would have figured out by now that if I haven't been "fixed" by now, it ain't gonna happen.
Anyway, the best way to deal with toxic people is to minimize contact with them, and this includes relatives. Unfortunately, even some well meaning relatives end up trying to bully us into being normal, which is not possible for us. This adds to our stress levels, and can cause more melt downs and shut downs. 
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau