🕎 Jewish Authorities (33–70 AD)
After the resurrection of Yeshua, His disciples continued preaching in Jerusalem, mostly to fellow Jews, proclaiming that He was the promised Messiah. This challenged the authority of:

The Temple Priests (Sadducees) – They saw this as a threat to their power, especially since the early followers were preaching about a risen Messiah who had criticized the corruption of the Temple system.

The Pharisees – They opposed the claim that Yeshua was the Messiah and were protective of the Oral Torah traditions that the followers of Jesus rejected.

🔥 Key Points:
Stephen was stoned (Acts 7) by Jewish leaders for proclaiming Yeshua.

Peter, John, and others were arrested and warned by the Sanhedrin (Jewish ruling council).

Many followers were driven out of synagogues (John 9:22; John 16:2).

Oral traditions and authority structures rejected any Messianic claim about Yeshua, viewing it as dangerous heresy.

🏛️ Roman Opposition
The Romans didn't initially care about theological debates among Jews. But as the movement grew:

Roman authorities saw followers of Yeshua as troublemakers, especially since they refused to worship the emperor or Roman gods.

The growing separation from mainstream Judaism made early believers stand out as a new sect, which made them politically suspicious.

By the 60s AD, Nero blamed Christians for the burning of Rome, leading to brutal persecutions.

🤝 Collaboration in Persecution
In some cases, the Jewish leaders and Roman authorities worked together:

When Yeshua was crucified, it was a Roman execution, but the Jewish leaders demanded it (John 19:6).

Paul (Saul) before his conversion was commissioned by Jewish leaders to hunt down believers.

📜 Suppression of Early Writings
You're absolutely right—there was strong oral and political opposition to any written Hebrew-Christian teachings:

Writings about Yeshua in Hebrew or Aramaic were often destroyed or suppressed.

By 70 AD, when the Temple was destroyed, many early followers had fled Jerusalem, taking their beliefs and possibly early Hebrew texts with them.

Later Romanized Christianity would use Greek writings, while the original Hebrew scrolls vanished or were hidden.