Jack is a nice, kind, loving and fatherly man, he raises his kids like they are his own. When Alex claimed that he saw burglars breaking into someone's house, he was skeptical to believe him at first. When he is proven wrong, he is proud of Alex.
"This is a very safe and secure neighborhood."
Home Alone 3
He is at work while his son Alex is sick with the chicken pox. When Alex calls the police a second time, he also believed that he did it for no reason. When he leaves for work, he almost forgets his pants until his son points that out to him. They tell each other that they love each other and he leaves for work.