question #2 Sahih al-Bukhari 5891, Book 77, Hadith 108 : Why is circumcision considered an important practice in Islamic tradition?

I heard the Prophet (ﷺ) saying. “Five practices are characteristics of the Fitra: circumcision, shaving the
pubic hair, cutting the moustaches short, clipping the nails, and depilating the hair of the armpits.”