Unfortunately, Zwicky was held in such disdain by most of his colleagues that his ideas attracted almost no notice. When, five years later, the great Robert Oppenheimer turned his attention to neutron stars in a landmark paper, he made not a single reference to any of Zwicky's work even though Zwicky had been working for years on the same problem in an office just down the hall. Zwicky's deductions concerning dark matter wouldn't attract serious attention for nearly four decades. We can only assume that he did a lot of pushups in this period.
This part of the passage simply amazed me in the fact that this was a smart man who had made incredible discoveries during his lifetime, but was ignored due to his rude behavior. It goes to show you that even if someone is awesome and amazing and incredible, if they are rude or insult others, they will generally be regarded with disgust and disdain. Even though Zwicky was smart, he wasn't smart enough to realize that maybe the way he treated people wasn't really the best way to treat them. And he suffered for it - his achievements were not recognized by the people around him, because they all thought he was a pretentious prick who only cared about himself- and why acknowledge someone like that?