I have not looked into this deeply other than some pondering so please feel free to enlarge...
Remembering that the Jewish nation has always been messiah focused and that there were at least 5 messiah claimants in the first century alone, i was wondering what may not have transpired had not Saul of Tarsus made his spectacular conversion.
It would seem that the messiah claimant Jesus of Nazareth's immediate circle of 12 followers (apostles) were quite often perplexed at his actions and utterances and possibly also not up to the task of keeping the whole show going once the Jews managed to have him executed.
Into the picture came Saul. Originaly an opponent of this poorly organized pesky 'sect' that was irritating the Jewish leaders, he all of a sudden experiences a 'conversion' and within a reasonable time manages to not only coordinate the whole bunch into a movement, but gets to write much of what has become accepted NT Bible. In short, Paul is more responsable for 'christianity' than even Jesus himself.
Kind of reminds me of Joseph F Rutherford... see a group lacking direction, claim some divine intervention and form it into a powerhouse movement.
If this opportunist Saul had not come along and taken over, i wonder if the group around Jesus of Nazareth would have died out in a few short years just like all the other Jewish messiah hopefulls have through history.
oz