How can one convince others of the error in the recently widespread ruling permitting singing, despite its clear prohibition in Sharia and prophetic hadiths, and in the face of opposition from family members who view its permissibility as an increase in religiosity?

A Muslim's ability to convince others of a Shariah ruling requires him to be knowledgeable of the Shariah proofs pertaining to the issue and to be capable of refuting opponents' arguments. Regarding the proofs for the prohibition of music accompanied by singing, one may refer to Fatwas No. 61775, 69680, 50031, and Sheikh Al-Albani's book "Tahrim Alat al-Tarab" (The Prohibition of Musical Instruments).