The New Testament gives the idea that no more than 20 or 30 years after Jesus' death, that tension between Jews and Christians was so bad it could be cut with a knife, but this isn't really so. The newly formed Christians continued to preach in the Synogogues up until the destruction in 70CE. The split between the two groups did not happen all at once, but it happened gradually over then next 3 centuries. While some put the final parting of the way between Jews and Christians at the Council of Nicea in 325 CE, others put it as early as 70 CE.
Mary,
Of course it was both true and immediate. Not Jews and Christians but Christian Jews and Christian Gentiles is the right was to put it. Look what James did to Paul after the matter was supposedly settled some 14 years earlier; Acts 21:23 Do therefore this that we say to thee: We have four men which have a vow on them; 24 Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and keepest the law. 25 As touching the Gentiles which believe, we have written and concluded that they observe no such thing, save only that they keep themselves from things offered to idols, and from blood, and from strangled, and from fornication. Wow and not something that happened over centuries. That famous letter was not intended for Jews to obey, Paul now learns. The issue was not settled as thought and years more of it would go on until James finally gave in and wrote his letter to such Jews which corrected his position over Law. But all this almost had Paul killed and by Christian Jews at that. The Roman army saved him. And you know that Synogogues did not go away simply because the Temple was destroyed. Paul continues to both mix in with and preach to them all along. Why is this not done today if the scriptures teach us that it can or should be done? No one has the talent for doing this anymore and the Jews are much different today about such things as well.
Joseph