Complex sentence: Santa tries to convince Jeff to abandon the Smiths, recognizing that he was not involved in their plot to hide his body but Jeff turns on Santa, and is able to pull Stan to safety where Stan sees Jeff as a true member of the family.
Split into simpler sentences: Santa tries to convince Jeff to abandon the Smiths, recognizing that he was not involved in their plot to hide his body. Jeff walks to Santa's side, but then turns on him and is able to pull Stan to safety, causing Stan sees Jeff as a true member of the family.