...Jesus as well as the apostles regularly used scripture (Old Testament) to sort of “bible beat” people, especially the Pharisees.
Yeah, Jesus quoted scripture to people who already accepted the authority of the Old Testament. But when He spoke to unbelievers like the woman at the well, the rich young ruler, Pilate, and the thief on the cross, Jesus wasn’t firing OT verses at em’. And Paul wasn’t quoting from the OT when he was speaking to the Athenians...but attempted to find common ground with them, even quoting their own poets and recognizing their “unknown God” beliefs...in order to connect them with the reality of the one true God and the truth of Jesus’ resurrection.
