In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Good manners have profound outcomes, which is why Allah and His Messenger have commanded us to embody good manners. The Messenger, peace and blessings of Allah be upon him, used to demonstrated these good manners in his interactions with others—with his family at home, his companions, or his adversaries. Even when a Jewish man greeted Allah’s Messenger (with the words), “As-Saamu Alaykum – death be upon you,” he responded, “Wa Alaykum – And upon you.” Aa’isha, may Allah be pleased with her, said (to the Jewish man), “Wa Alaykumus Saam Wal lanah – Death be upon you and the curse of Allah.” The Messenger said, “O Aa’isha! Indeed, Allah is kind and gentle, and He loves kindness and gentleness.”Look (at how) the Jewish man was treated with kindness and gentleness?! If he sees this kindness and gentleness, it may urge him towards Islam, or at the very least these lofty manners could mitigate much of the evil of this person, thereby making you upright and your invitation to the Religion of Allah.

An Excerpt from Marhaban Yaa Taalibal Ilm page 88