Fatwa Relating To Congratulating On Non-Muslim Festivals
This is the only recent article of Dr. Ammar Khan Nasir which discusses the fatwa of Mufti Kifayatullah. May be it is the context which Ghamidi Sahab was referring to when dealing with interreligious festivals and customs. Unfortunately, it is not available in English. Dr. Irfan Shahzad Sahab ( @Irfan76 ) might be able to clarify this matter.