Question sister.
Do you think that they did not know about Christ's 1st Coming, OR do you think that they just rejected it ??????
Consider Matt. 2:4 and the question Herod asked of his Jewish priests........
"And when he had gathered all the chief priests and scribes of the people together, he demanded of them, where Christ should be born?"
And the answer came from them that........
"And they said unto him, in Beth-lehem of Judea for thus it is written by the prophet".
THEY even knew WHERE He was to be born.
I think some believed and were saved. I think some knew and rejected for whatever reason. We have the benefit of hindsight and yet ......