I do not think it is a matterof the rejection of the hadith or non rejection. It is rather that only the Qur'an is taken as divinely instructions. The rest can be regarded in its own merits and on the appreciation of ech person as to its values, usefulness, authenticity, integrity, sincerity or any parameterone may think. That is, the rest is like any reading, spiritual, or religious or philosophical reading. Salam