What Do Christians Believe About Other Religions: A Three-Faith Comparison

Judaism's attitude toward other religions is shaped primarily by the concept of covenant particularity. The Torah was given specifically to the Jewish people, and Jews are not generally expected to convert others. Non-Jews are evaluated by the Noahide Laws — seven universal moral commandments — rather than the full 613 commandments of the Torah. A gentile who observes these laws is considered a 'righteous gentile' (ger tzedek) and has a share in the World to Come, according to the Talmud (Sanhedrin 105a).

This means Judaism is notably non-missionary in orientation. Maimonides (12th century) codified the view that Christianity and Islam, despite their errors from a Jewish perspective, serve a providential purpose in spreading monotheism to the nations. However, Jewish law has historically prohibited participation in other religions' rituals, viewing them as forms of idolatry (avodah zarah). The sharp distinction between Israel's covenant and the nations remains central, though modern liberal movements have softened exclusivist language considerably.

Christian views on other religions span a wide spectrum, but the tradition's historic mainstream has been exclusivist: Jesus Christ is the unique and necessary mediator of salvation. This conviction rests on the centrality of the resurrection — Paul states plainly that 'if Christ be not risen, then is our preaching vain, and your faith is also vain' 1 Corinthians 15:14, and further that 'if Christ be not raised, your faith is vain; ye are yet in your sins' 1 Corinthians 15:17. If the resurrection is the hinge of history, then religions that deny it are, in the classical view, fundamentally mistaken.

Paul also draws a sharp moral and spiritual boundary between believers and unbelievers, asking rhetorically, 'what concord hath Christ with Belial? or what part hath he that believeth with an infidel?' 2 Corinthians 6:15. This language has historically been used to justify separation from non-Christian religious practice. Yet even Paul acknowledges that Christ can be proclaimed through imperfect or even insincere means — 'notwithstanding, every way, whether in pretence, or in truth, Christ is preached; and I therein do rejoice' Philippians 1:18 — suggesting a certain pragmatic openness to unexpected vehicles of truth.

Theologians like Karl Barth (20th century) argued for strict exclusivism, while Vatican II (1965) introduced 'inclusivist' language, suggesting non-Christians may be saved through Christ without explicit knowledge of him. Pluralists like John Hick (1970s–1990s) went further, arguing all religions point to the same ultimate reality — a view most evangelical and Catholic theologians reject. The warning in Mark 13 against false Christs Mark 13:21 reinforces the need for discernment about competing religious claims.

The church itself — the community gathered around Christ Ephesians 5:32 — is traditionally seen as the ordinary means of salvation, making the question of outsiders theologically urgent. Disagreement remains intense between Protestant, Catholic, and Orthodox traditions on exactly how exclusive salvation is.

Islam teaches that it is the final, complete, and uncorrupted form of the one religion God has always revealed — called 'Islam' (submission) in its essence. Judaism and Christianity are recognized as earlier revelations from the same God, and their prophets (Moses, Jesus) are honored. However, the Quran teaches that both communities corrupted or misinterpreted their scriptures over time (a doctrine called tahrif). Jesus is revered as a prophet and messiah but emphatically not as divine — the Trinity is considered shirk (associating partners with God), the gravest sin in Islam.

The Quran designates Jews and Christians as 'People of the Book' (Ahl al-Kitab), granting them a protected status (dhimmi) in classical Islamic law that polytheists did not receive. They could practice their faith under Islamic governance, though with certain restrictions. Scholars like Ibn Taymiyya (14th century) and, later, Sayyid Qutb (20th century) took harder lines on interfaith relations, while others like Ismail al-Faruqi argued for respectful dialogue grounded in shared Abrahamic roots.

Ultimately, classical Islamic theology holds that salvation requires accepting Muhammad as the final prophet and the Quran as God's definitive word. Those who reject this after hearing it clearly are considered to have refused divine guidance. Modern Muslim scholars debate whether sincere followers of earlier traditions who never encountered authentic Islam might receive divine mercy — a question that parallels the Christian inclusivist debate.