A person's behavior is often shaped by their families; as a result, people who come from toxic families sometimes become toxic themselves because of their family's influence. A good person in a rotten family might end up committing evil actions or becoming evil themselves because of their relative's influence or a desire to be accepted. A person who looks up to a relative might emulate said relative's bad behavior out of blind admiration or naivety. It's also possible for someone's relatives to directly raise them to be terrible people.