question #2 Sahih al-Bukhari 3558, Book 61, Hadith 67 : What was the significance of the Prophet Muhammad (ﷺ) initially following the customs of the People of the Scriptures?

Allah’s Messenger (ﷺ) used to let his hair hang down while the infidels used to part their hair. The people of
the Scriptures were used to letting their hair hang down and Allah’s Messenger (ﷺ) liked to follow the people
of the Scriptures in the matters about which he was not instructed otherwise. Then Allah’s Messenger (ﷺ)
parted his hair.