Congratulating the Non-Muslim Neighbor on Occasions of Joy and Illness

Question:
Honorable Shaykh, how does one congratulate a non-Muslim neighbor in cases of joy and illness, and when meeting him on the road?

Answer:
Is singing permissible? Yes, is it permissible to sing with some of the displays of disbelief? No, the festivals of the disbelievers are not to be celebrated with singing. However, if a child is born, or if a house is built, or if something else happens, there is no harm in singing, especially if the intention is to reconcile him and invite him to Islam. One visits the neighbor, or goes to his house, invites him to Islam, and treats him well as a neighbor, because this displays Islam in a good light and shows the virtues of Islam. People do not sing in these matters.