
Kathryn P. answered 08/20/19
Master of Arts in Education, Specializing in Writing Skills
You are absolutely right! A "contumelist" would be someone who behaves with an insulting display of contempt toward somebody else and it is not, in point of fact, a recognized word. The author was most likely using creative license there, recognizing (as you did) that the suffix "ist" denotes a person who practices or is concerned with something.