@fmf said
Why is it such a dealbreaker for most Christians [with regard to whether they consider someone to be a kindred spirit ~ a "cultural Christian", perhaps?] if that person simply doesn't believe that Jesus experienced a cessation of all biological functions as a result of being executed that lasted 72 hours followed by a reactivation of those biological functions? Aren't there much ...[text shortened]... eachings ~ than this totally unverifiable and seemingly take-it-or-leave-it story of "resurrection"?
If the resurrection didn't really happen, really physically, and not merely metaphorically/spiritually/allegorically, then that blasts Christianity out of the water. The resurrection is the 'proof', if you will, that the teachings attributed to Jesus are divine in origin, the certification that they are Laws Of God With Capital Letters, backed up by eternal threats, and not merely man-made guidelines/policies which might be a good idea.
If you subtract the resurrection from Christianity, you are not left with all the ethical bits intact ('thou shalt not kill' etc. etc.). What you are left with is an edifying myth on a level with every other edifying myth propagated throughout history (gilgamesh, Osiris, Prometheus, etc. etc.) which Christianity dismisses as false religion. So Christianity itself becomes false religion, by its own definition, if you subtract the bodily resurrection.
EDIT: The chap you should be reading is Don Cupitt
http://www.doncupitt.com/don-cupitt
Anglican priest who has written many books; you could start with "Taking Leave of God" wherein he makes a case for jettisoning all the unverifiable, superstitious, magical, bits from Christianity -- including, SPOILER ALERT, the existence of God.