AD 70 matters because Jesus’ warning concerned a real city, temple, and generation. Matthew places His prediction of the temple’s destruction immediately after His charges against unfaithful leadership and His lament over Jerusalem (Matthew 23:29–24:3). We should hear that sequence before treating the warning as a prediction detached from His ministry.
Luke makes the threatened circumstances concrete: Jerusalem surrounded by armies, people fleeing, and days of vengeance (Luke 21:20–24). We understand the Roman destruction of Jerusalem and its temple in AD 70 as the fulfillment of this covenant judgment. Jesus did not name the calendar year; the setting and timing of His warning provide grounds for identifying its fulfillment.
The temple was the public center of the Mosaic administration, with its priesthood and sacrifices. Its destruction therefore carried significance beyond the loss of a building. We understand it as the historical ending of that order, whose purpose Christ’s offering had already fulfilled (Hebrews 8:6–13; 10:19–22).
This does not mean salvation began in AD 70. Christ had already established the New Covenant, and believers already had access to the Father. Nor does the temple’s fall alone explain every resurrection or judgment promise. Those passages require their own examination.
For you today, the personal assurance is that access to God rests in Christ. You do not need a restored temple or another sacrifice before coming near to the Father.
For the prophetic background to this covenant transition, read What Do Daniel’s Seventy Weeks Reveal About Christ and Covenant Fulfillment?. The teaching distinguishes Christ’s completed sacrifice from Jerusalem’s later destruction and explains the chronological questions that remain.
Scripture in this answer
Matthew 23:29–24:3 · Luke 21:20–24 · Hebrews 8:6–13; 10:19–22