question #2 Sahih al-Bukhari 12, Book 2, Hadith 5 : How does Islam encourage interaction with both acquaintances and strangers?

A man asked the Prophet (ﷺ) , “What sort of deeds or (what qualities of)
Islam are good?” The Prophet (ﷺ) replied, ‘To feed (the poor) and greet
those whom you know and those whom you do not Know (See
Hadith No. 27).