One day, Jane and Holden has done something sexual and her step father picks up fight with Jane. Holden suspects him because her step father is an alcoholic, who though have not tried something with her, however he neither is a good father figure nor effectively provides for his family. Instead, he sucks up income of the family. He is not a decent man and walks around his house naked. So, we can straightly say, Mr. Cudahy himself is not good and therefore, thinks negatively about Jane and Holden too.
Cause of Trouble between Jane and her Step-father in “the Catcher in the Rye”