What Does Interfaith Mean in Religion? A Three-Faith Comparison

In Judaism, interfaith dialogue has a long and contested history. The tradition places strong emphasis on maintaining distinctions — between the holy and the common, the clean and the unclean — as a foundational religious obligation Leviticus 10:10. This concern for havdalah (separation) has historically made some Jewish authorities cautious about interfaith engagement that blurs theological lines.

That said, modern Jewish thinkers like Rabbi Joseph B. Soloveitchik (in his 1964 essay "Confrontation") drew a careful distinction: Jews could engage with other faiths on shared humanitarian and ethical concerns, but not on matters of core theological identity. Many liberal Jewish movements, including Reform and Conservative Judaism, have embraced interfaith dialogue as consistent with the prophetic call to justice and the commandment to love one's neighbor.

The principle of tikkun olam (repairing the world) is frequently invoked to justify cooperation with people of other faiths on social justice issues, even when doctrinal agreement is absent. Fervent love and charity toward all people is seen as a Jewish value 1 Peter 4:8, even across religious lines.

Christianity's relationship with interfaith dialogue is genuinely complex and internally divided. On one hand, the New Testament calls believers to fervent love across all boundaries — "above all things have fervent charity among yourselves: for charity shall cover the multitude of sins" 1 Peter 4:8. On the other hand, Paul's letters draw sharp lines around spiritual partnership with non-believers 2 Corinthians 6:14.

The tension is real. 2 Corinthians 6:14 has been cited for centuries by conservative Protestants as a warning against interfaith marriage, worship, or theological compromise 2 Corinthians 6:14. Paul presses the point further in the very next verse, asking what "concord hath Christ with Belial" — meaning, what genuine agreement can exist between fundamentally opposed worldviews 2 Corinthians 6:15.

Yet the Second Vatican Council (1965, Nostra Aetate) marked a watershed moment for Roman Catholicism, formally affirming that the Church "rejects nothing that is true and holy" in other religions. Mainline Protestant denominations have similarly embraced interfaith councils and joint prayer services. Evangelical and fundamentalist traditions, however, often cite passages like 2 Corinthians 6:14 to resist such engagement 2 Corinthians 6:14, arguing it compromises the exclusive claims of the Gospel.

Islam's approach to interfaith dialogue is shaped by a distinctive theological claim: that God sent a continuous line of prophets — including Abraham, Moses, Jesus, and Muhammad — and that selectively accepting some while rejecting others is itself a form of unbelief. The Quran explicitly condemns those "who believe in some and disbelieve in others" and seek a middle path between full acceptance and full rejection Quran 4:150. This means Islam doesn't view interfaith engagement as a concession but as a natural consequence of its universal prophetic worldview.

Classical Islamic jurisprudence recognized the concept of ahl al-kitab (People of the Book), granting Jews and Christians a recognized status within Islamic societies. Scholars like Ibn Rushd (Averroes, 12th century) and, in the modern era, Tariq Ramadan have argued that Islam is inherently disposed toward dialogue because it already affirms the validity of prior revelations in principle.

However, there are limits. Theological compromise — suggesting that all religions are equally valid paths to God — is generally rejected by mainstream Islamic scholarship. Interfaith dialogue is encouraged as a means of mutual understanding and cooperation, not as a flattening of doctrinal differences. The Quran's insistence on recognizing all of God's messengers Quran 4:150 actually sets a high bar: genuine interfaith respect requires acknowledging the full prophetic chain, which non-Muslims typically don't accept.