Also, consider the fact that Mark doesn't seem to know anything about a resurrection story ... in fact, this was so shocking and embarrassing that some scribes took it up upon themselves to add a spurious "short conclusion" and a "long conclusion" to Mark, in order to at least make it seem that Mark knew something about it.
Also, about Paul and his feud with the apostles in Jerusalem ... I have the feeling that Paul could easily have considered that the apostles framed him in the Jerusalem Temple episode ... that the good (in fact, terrible) advise they gave him order to prove his jewish orthodoxy obedience to the Law was in fact a ruse to have him arrested or killed by an angry mob (remember who started the riot? The "Jews from Asia", possibly the same people whom Paul had unsuccessfully attempted to convert in Ephesus - Acts 19:8-10) Even if it wasn't that the intention of the apostles (I think it's not entirely impossible, if they really thought he was an apostate, in which case they were in agreement with orthodox Jews), at the very least Paul could see the chain of events in that way, and that can explain the extremely harsh tone he employed in some of his letters to refer to the apostles and the "jewish Jesus movement" followers as opposed to his Christ movement followers. (Compare to Phillipians 3:2, where Paul calls these "dogs")