How does Allie’s death affect Holden?

Allie’s death greatly affects Holden in the jaded way Holden looks at life, in how he struggles to connect with people, and in the way he feels the need to protect youthful innocence. Holden says, “He got leukemia and died . . . You’d have liked him. . . . I was only thirteen, and they were going to have me psychoanalyzed and all, because I broke all the windows in the garage. . . . I even tried to break all the windows on the station wagon . . . I hardly didn’t even know I was doing it.” Holden’s clear admiration for his younger brother, his guilt from not being able to protect him, and his extreme reaction to his death prove how greatly Allie’s death affected him. Readers might wonder if this tragic event triggered Holden’s mental decline.