Basically the article describes a Baal Teshuva from Eastern Europe who was a guest for Shabbos at an Avrech's house. When the Avrech saw that the boy hated chulent he recalled the statement of the Baal Hamaor that someone who doesn't eat hot food on Shabbos is a מין. He also noticed that the boy didn't move (shuckle) when he davened. Based on this, the avrech feared that the boy was not Jewish. After investigations could not determine whether the boy was really Jewish he underwent a גירות לחומרא.
My first thought after reading this was that it was some kind of joke. The Baal Hamaor is talking about someone who doesn't eat hot food בשיטה because he holds it is assur to eat hot food. It has no application to someone who just doesn't like chulent. Shuckling is also overrated. R' Moshe Feinstein stood stock still when davening, he felt that this showed much more כבוד then shuckling.
