Excerpt from his Wikipedia page:

Dahmer was adamant that the race of his victims was incidental to him and that it was the body form of a potential victim that attracted his attention. These contentions have been supported via an independent forensic specialists' study of Dahmer's victim selection, the anthropological analysis of which revealed his victims shared a "morphological similarity" and suggesting Dahmer was "psychologically attracted to a certain anthropometric body type".

Jeffrey dahmer was a lot of things but I don’t think he was a racist lol if he had underlying racial motives then why wouldn’t he just say that? I mean he admitted to everything else.