I had two family members involved in World War I: two great-uncles. One of them is on a memorial in France. And the other was a trench runner who survived the war. The average life span of a trench runner was 36 hours, but he survived the whole war.
If one does away with the fact of the Resurrection, one also does away with the Cross, for both stand and fall together, and one would then have to find a new center for the whole message of the gospel.