Mac was not apologizing for his parents, there is a long-running gag on the show about how Mac's parents are horrible and don't care about him. He thought he had a nice family Christmas tradition and he found out that, instead, his family was stealing. Mac is really not any better than his parents, so his attempts at making amends for stealing don't go too far, but that is the point. The characters are all egotistical and awful but they are terribly funny. I am so incredibly tired of seeing people review this show who have never even seen it.