Quraan Vaazh Hidayat Hai Phir Bhi Ikhtilaf Kyu
Kufr is deviation from monotheism, doing wrong deeds and deny the judgment day, prophets and angels. As long as they adhere to basic tenets of Islam they are not in danger. The iktilaf is not in obligatory parts but the optional part or application of certain philosophy/rulings which donot render them kafir or deviant. what a common muslim should do. Ghamidi sb has following comments https://www.youtube.com/watch?v=4kJ7glu3oaM