They were probably quite familiar with the old testament and quoted it a great deal when spreading the good news of Jesus Christ. They had probably read and memorized many of its passages as well. However, I think its unlikely they had a COMPLETE, printed copy of ALL the canonical old testament books readily available, unless they were some authoritative Jewish scholar of that era. It was extremely difficult for the "average person" to obtain such things before the printing press was invented.
One thing I can say for certain is they wouldn't have believed in sola scriptura, since the very earliest Christians came out of the Jewish faith, and the concept of "Torah alone" being sufficient authority has ALWAYS been considered a tiny fringe movement in Judaism. (This is known as "Karaite Judaism", a belief that oral tradition is invalid and later Jewish historical sources like Midrash or Talmud have no bearing on their faith because they are not part of scripture. Mainstream Judaism views the Karaites as "not true Jews")
You also need to study up on what type of government we have in the United States.
Yes; you MAY say it with certainty; but it certainly does NOT mean that they dis-believed it.
Yes; you MAY say it with certainty; but it certainly does NOT mean that they dis-believed it.
Strangely; a Messenger from GOD told an angel to tell John to WRITE the message down: seven times.
Here is just one...
Revelation 2:1
“To the angel of the church in Ephesus write: