question #1 Sahih al-Bukhari 6928, Book 88, Hadith 10 : How should Muslims respond to greetings from non-Muslims that may have negative connotations?

Allah’s Messenger (ﷺ) said, “When the Jews greet anyone of you they say: ‘Sam’Alaika (death be upon you);
so you should say; ‘Wa ‘Alaika (and upon you).’”