question #1 Sahih al-Bukhari 5917, Book 77, Hadith 132 : How did the Prophet Muhammad (ﷺ) approach cultural practices that were not explicitly addressed by divine revelation?

The Prophet (ﷺ) used to copy the people of the Scriptures in matters in which there was no order from
Allah. The people of the Scripture used to let their hair hang down while the pagans used to part their
hair. So the Prophet (ﷺ) let his hair hang down first, but later on he parted it.