All perfect praise be to Allah the Lord of the Worlds. May Allah`s peace and blessings be upon our Prophet Mohammad and upon all his family and companions.

Islam is a religion characterized by moderation and balance. It imposes upon the legally responsible individual (Mukallaf) obligations that achieve for them a mental, spiritual, and physical equilibrium, enabling them to enjoy a good life that brings about happiness and tranquility.

Islam is distinguished by its comprehensiveness; its address is universal, encompassing all people, whether they are Muslim or non-Muslim. This is evident from the noble Quranic texts and the noble Prophetic traditions. Allah, the Exalted, says {what means}: "O Mankind! The Apostle hath come to you in truth from God: believe in him: It is best for you. But if ye reject Faith, to God belong all things in the heavens and on earth: And God is All-knowing, All-wise." [An-Nisa'/170]. Jabir reported God`s  messenger as saying, "I have been given five things which no one before me has been given: I have been helped by terror [being put in the hearts of enemies] as far as a month's journey away, the earth has been made for me a place of worship and ceremonially pure, so that when the time of prayer comes any man of my people may pray; spoils have been made lawful to me, but were not made lawful to anyone before me; I have been granted the right of intercession; and prophets were formerly sent to their people alone, whereas I have been sent to all mankind." [Narrated by Al-Bukhari].

The legal obligations in Islam are of two types: Foundational Doctrinal obligations and Practical Jurisprudential obligations. All legally responsible individuals, Muslims, or followers of other religions, are required to adhere to these legal obligations.

As for the foundational religious tenets that are obligatory upon the legally responsible individual, they are the firm, decisive belief in Allah, the Exalted, and in what the Prophet Muhammad, peace be upon him, brought, as is necessarily known from the religion. The books of Islamic theology and creed have undertaken the task of explaining these foundational tenets and their evidences.

As for the practical branches, they are represented by the acts that Islam has mandated, which are built upon the affirmation of the foundational tenets. These include the Five Pillars upon which Islam is built: the testimony that there is no deity worthy of worship except Allah and that Muhammad is the Messenger of Allah, establishing the prayer, giving the Zakat, fasting the month of Ramadan, and performing the pilgrimage to the House for whoever is able to find a way thereto, along with other similar practical jurisprudential obligations. Scholars have undertaken the task of detailing these branches in the books of Islamic jurisprudence, with all their breadth and vastness.

Whoever from the followers of other religions denies these foundational or practical obligations and claims that it suffices him to believe in his own religion without following our Master Muhammad, peace be upon him, and adhering to the religion of Islam, is contradicting himself. This is because the source of religion is one, which is Allah, the Exalted, and the obligation is conveyed from the Prophet, supported by miracles, through definitive, successive transmission. Imam Al-Amidi said: "Whoever adheres to the law of some previous prophet, then every argument he directs – such as denying the existence of Muhammad, his claim to prophethood, or denying its definitive transmission – is an argument that can equally be used against him regarding the existence of his own prophet and his claim to prophethood." [Abkar al-Afkar, Vol.4/P.117]. Therefore, it is obligatory upon the followers of other religions, if they are true believers, to enter the religion of Islam and follow its Prophet, peace be upon him.

It is not permissible for a Muslim or anyone else to deny the obligation of following the Prophet, peace be upon him, in the jurisprudential branches of the religion, using adherence to another religion as a pretext. Indeed, Islam is the one true religion, and its law has abrogated every previous law. It is obligatory for all people to follow it, both in its foundational tenets and its practical branches. This is a matter necessarily known from the religion and is not open to denial. Allah, the Exalted, says {what means}: "Say, [O Muhammad], "O mankind, indeed I am the Messenger of Allah to you all, [from Him] to whom belongs the dominion of the heavens and the earth. There is no deity except Him; He gives life and causes death." So believe in Allah and His Messenger, the unlettered prophet, who believes in Allah and His words, and follow him that you may be guided." [Al-A'raf/158].

In conclusion, Islam views the followers of other religions as being legally obligated to follow the foundational tenets of faith and the practical jurisprudential branches. They are required to believe in Allah and His Messenger Muhammad, peace be upon him, and to comply with the legal obligations. And Allah the Almighty knows best.