Thank you for sharing that informative article, which quotes the actual emailed reasons for the failing grade:
You all lack the honor and maturity to live up to the standards that Texas A&M holds, and the competence and/or desire to do the quality work necessary to pass the course just on a grade level. I will no longer be teaching the course, and all are being awarded a failing grade."
The article also explains why the Professor, a guy with 20 years of college teaching experience, is in his 1st year at Galveston:
The professor, who is new to Galveston, relocated (to a non-tenure-track position) because his wife holds an academic job in Houston, and they have had to work hard to find jobs in the same area. He stressed that the students' failings were academic as well as behavioral. Most, he said, couldn't do a "break-even analysis" in which students were asked to consider a product and its production costs per unit, and determine the production levels needed to reach a profit.
In most of his career, he said, he has rarely awarded grades of F except for academic dishonesty. He said he has never failed an entire class before, but felt he had no choice after trying to control the class and complaining to administrators at the university.
Students have complained that they need this class to graduate, and Horwitz said that based on the academic and behavioral issues in class, they do not deserve to graduate with degrees in business fields (the majors for which the course is designed and required).