I just want to support your comment -- I've known "this mathematician" (Edray Goins) personally for two decades, work on similar mathematics to him, and I wrote research letters supporting his tenure and promotion at Purdue. He is definitely NOT stupid, his research is extremely interesting, and his ability to get undergraduates involved in research level mathematics is outstanding. People do racist things, and this is overall very self-destructive for our communities; it helps very much that people like Edray have a voice.