Judaism is the faith of the Jewish people — and it's the root from which Christianity grew. Jesus was Jewish. The disciples were Jewish. The Old Testament is the Jewish scriptures.
Jews believe in one God — the same God who made the world, called Abraham, led Israel out of Egypt through Moses, and made covenants with his people. They hold the Torah (the first five books of the Bible) as the most sacred text, and follow the commandments as the way God told his people to live.
The big question between Judaism and Christianity: who is Jesus?
Jews believe the Messiah is still coming. They don't believe Jesus was the Messiah — partly because, in their understanding, the Messiah was supposed to bring peace, rebuild the Temple, and gather all Jewish people to Israel. Jesus didn't do those things (at least not visibly). Christians believe he will do some of those things when he returns, and that the cross was the fulfillment of a different, deeper kind of messianic prophecy.
Both Christianity and Judaism share the Old Testament. Both believe in a God who acts in history, who made promises, and who will ultimately bring justice. Both pray, study scripture, and care deeply about how you live in response to God.
The disagreement is real and significant. But the shared foundation is also real and deep.
Key verse: "Hear, O Israel: The LORD our God, the LORD is one." — Deuteronomy 6:4
Judaism is the oldest of the three Abrahamic faiths, and the one from which Christianity directly emerged. The God of Israel is the God of the New Testament. The covenants, the prophets, the Messiah, the scriptures — all of it comes through Israel. Christianity does not replace Judaism; it claims to fulfill what Judaism was always pointing toward.
Rabbinic Judaism — the form of Judaism practiced today — developed after the destruction of the Second Temple in 70 CE. When the Temple was destroyed, the sacrificial system ended. The rabbis rebuilt Jewish religious life around the Torah (the five books of Moses), the Mishnah (the codified oral law), and eventually the Talmud (the vast commentary tradition). The synagogue replaced the Temple; the rabbi replaced the priest; prayer and Torah study replaced sacrifice.
The Jewish understanding of relationship with God is covenantal. God chose Israel — not because Israel was worthy, but by sovereign grace (Deuteronomy 7:6-8). That election created a covenant, and the covenant requires Israel to live by the Torah — the 613 commandments of Jewish law (mitzvot). Teshuvah (return/repentance) — abandoning wrongdoing, feeling genuine regret, confessing, and resolving not to repeat — is the path back to God when the covenant is violated.
The shared foundation
The Hebrew Bible (the Tanakh) is the shared scripture of Judaism and Christianity — what Christians call the Old Testament. The Dead Sea Scrolls confirm the textual stability of the Hebrew Bible back to the 3rd–2nd centuries BCE. Judaism and Christianity share: the creation narrative, the Abrahamic covenant, the Exodus, the Davidic covenant, the prophetic literature, and the entire framework of covenant, sacrifice, and promise.
This is not incidental. Christianity is incomprehensible without its Jewish roots. The apostles were Jews. Jesus was a Jew. The earliest church was Jewish. The first council (Acts 15) debated the relationship between Jewish law and Gentile believers. The New Testament is saturated with Old Testament citations, allusions, and fulfillment claims.
Sanders' covenantal nomism
E.P. Sanders' framework is essential for honest engagement: in Second Temple Judaism, Jews understood themselves as getting in to the covenant by divine election (grace) and staying in through Torah observance (law). The Protestant caricature of Judaism as earning one's way to God by works-righteousness misrepresents how Jewish theology actually functioned. Jews did not understand themselves as accumulating merit to purchase salvation — they understood themselves as living within a relationship already established by God's sovereign choice.
The irreducible question
The apostolic claim is not that Judaism was wrong about election or wrong about covenant. It is that the covenant pointed forward — to a Messiah who would fulfill the law, bear the sins of the people, and establish the new covenant prophesied by Jeremiah (31:31-34). The question is not whether the covenant was real. It is whether it was sufficient in itself or whether it was always designed to arrive somewhere.
Jesus's claim — and the apostolic proclamation — is that he is the telos (goal, fulfillment) of the Torah (Romans 10:4). The rabbis who rejected this claim were not wrong about the Torah. They were wrong about what the Torah was pointing to.
The apostolic posture
Paul's letters are the primary record of the apostolic engagement with this question, and the posture is sharp. Paul was himself a Pharisee ("of the tribe of Benjamin, a Hebrew of Hebrews; as to the law, a Pharisee" — Philippians 3:5). He knew the tradition from the inside. His argument is not that Jewish people are bad or that their scriptures are false — it is that the scriptures themselves testify to Jesus (John 5:39), and that the blindness preventing recognition of this is a real spiritual condition that requires the same rescue available to everyone.
Romans 9-11 is the most careful apostolic treatment: Israel has not been abandoned, the gifts and calling of God are irrevocable (11:29), and the mystery of Israel's hardening is temporary and purposeful within God's larger plan. This is not replacement theology. It is fulfillment theology held in tension with a genuine grief over the people from whom the Messiah came.
Sacrifice and the post-Temple problem
The destruction of the Second Temple in 70 CE created an unresolved theological problem within Rabbinic Judaism: the Torah prescribes animal sacrifice as the mechanism of atonement (Leviticus 17:11 — "the life of the flesh is in the blood, and I have given it for you on the altar to make atonement for your souls"). Without the Temple, the sacrificial system cannot operate. Rabbinic Judaism resolved this by substituting prayer, Torah study, and teshuvah — but this substitution is not mandated by the Torah itself.
The apostolic reading is that the Temple's destruction was not a tragedy requiring a workaround — it was the removal of a system that had been fulfilled. The final sacrifice had already been made. The Epistle to the Hebrews makes this case at length: Jesus is the high priest who offered himself once for all (Hebrews 9:11-14), making the Levitical system not obsolete-by-destruction but fulfilled-and-completed.
The Messianic question in the prophets
The Hebrew prophets generate dozens of specific Messianic predictions: born in Bethlehem (Micah 5:2), of the line of David (Isaiah 11:1), entering Jerusalem on a donkey (Zechariah 9:9), betrayed for thirty pieces of silver (Zechariah 11:12-13), hands and feet pierced (Psalm 22:16), lots cast for garments (Psalm 22:18), buried with the rich (Isaiah 53:9), rising from death (Psalm 16:10 — cited by Peter at Pentecost). The historical Jesus of Nazareth satisfies these in a way that no other proposed candidate in Jewish history has approached.
Citations requiring Berean pipeline pass:
- Deuteronomy 7:6-8 (divine election, not based on Israel's greatness) — WLC (SC-001)
- Jeremiah 31:31-34 (new covenant prophecy) — WLC
- Leviticus 17:11 (blood atonement) — WLC
- Hebrews 9:11-14 (once-for-all sacrifice) — SBLGNT
- Romans 10:4 (Christ as telos of Torah) — SBLGNT
- Romans 11:29 (gifts/calling irrevocable) — SBLGNT
- John 5:39 (scriptures testify to Jesus) — SBLGNT
- Philippians 3:5 (Paul's Jewish credentials) — SBLGNT
- Psalm 22:16, 18; Psalm 16:10; Micah 5:2; Isaiah 53:9; Zechariah 9:9; 11:12-13 — WLC
Academic references requiring verification:
- Sanders, Paul and Palestinian Judaism — covenantal nomism definition
- Dead Sea Scrolls dating (3rd–2nd century BCE fragments) — verify current AI-assisted dating results
Posture requirement: This page must honor the depth and integrity of the Jewish tradition while being clear about the apostolic claim. The grief Paul expresses in Romans 9:1-5 is the model — "I have great sorrow and unceasing anguish in my heart. For I could wish that I myself were accursed and cut off from Christ for the sake of my brothers, my kinsmen according to the flesh." That is not the posture of contempt. It is the posture of someone who loves the tradition and is heartbroken that the majority of that tradition missed its own fulfillment.