Is it permissible for a Muslim to offer condolences to his non-Muslim relative upon the death of his parents or any of his relatives, especially if the Muslim fears that if he does not offer condolences, his non-Muslim relatives may cause him any harm or cause him to abandon Islam?
It is permissible for a Muslim to offer condolences to his non-Muslim relative if his intention is to endear Islam to their hearts. This is one of the objectives of Shari`ah (Islamic Law). He may also offer condolences to them for the purpose of averting any potential harm that might be caused to them or to other Muslims if they refuse to do so. It is excusable if slight harm is caused while attempting to safeguard the public interest of Muslims.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.