Is it permissible to participate in the condolences of Jews upon the death of one of their family members, knowing that most interactions with them are within the same company?

Scholars differ on the ruling concerning offering condolences to Jews, Christians, and others. Some scholars permit it, while others restrict it to cases of [realizing] a legitimate benefit (maslaha shar'iyya), such as da'wah (inviting to Islam) or averting harm. The scholars who permit it advise choosing words that do not contain a religious prohibition, such as: "May Allah compensate you (for your loss) and not decrease your numbers," or "May Allah grant you in place of your affliction something better than He has granted anyone else of your religion," or "May Allah mend your loss." However, one should not supplicate for the deceased to receive mercy and forgiveness. Offering condolences falls under the category of good treatment and justice; it contains no religious prohibition and does not constitute showing loyalty to them. This differs from congratulating them on their forbidden religious holidays, as that involves an affirmation of their falsehood and an agreement with their polytheism (shirk).