The worst of sins are Infidelity (Kufr ) and Polytheism (shirk ) which constitute rebellion against Allah, The Creator. To eradicate these, Muslims are required to wage war until there exists none of it in the world, and the only religion is that of Allah.

Tafsir Anwarul Bayan , I, 235. on Quran 2.193 Muhammad Aashiq Ilahi Bulandshahri, Illuminating Discourses on the Noble Qur’an (Tafsir Anwarul Bayan ), Afzal Hussain Elias and Muhammad Arshad Fakhri, trans. (Karachi: Darul Ishaat, 2005) quoted in The critical qur’an: explained from key islamic commentaries and contemporary historical research. (2021)