What are some obstacles Danny and Reuven face?

The main conflict between the book is between the secular and the religious; this is a conflict that manifests itself in numerous instances both internal and external. The most obvious juxtaposition of the ësecular' and the ëreligious' is shown in the friendship between Reuven Malter, who has more flexible religious customs, and Danny Saunders, who comes from a very strict Hasidic background. Check out the link below,

http://www.gradesaver.com/the-chosen/study-guide/major-themes/