These include retribution by armed jihad for the perceived injustices of unbelievers against Muslims (especially by Al-Qaeda); the belief that the killing of many self-proclaimed Muslims is required because they have violated Islamic law and are actually unbelievers (kafir); the need to restore and purify Islam by establishing sharia law, especially by restoring the Caliphate as a pan-Islamic state (especially ISIS); the glory and heavenly rewards of martyrdom; the supremacy of Islam over all other religions.