"But if Christ is preached as raised from the dead, how can some among you say there is no resurrection of the dead? For if the dead are not raised, neither has Christ been raised, and if Christ has not been raised, your faith is vain; you are still in your sins. Then those who have fallen asleep in Christ have perished. If for this life only we have hoped in Christ, we are the most pitiable people of all. But now Christ has been raised from the dead, the firstfruits of those who have fallen asleep."
Now, how can any Christian hear that and not believe in the bodily resurrection? Easy: redefine the Faith as a collection of religious opinions. Everybody's got some, and they can always change. In the West at least, that's what all too often passes for Christianity.
No wonder the Muslims reproduce and we don't. We have the content of the Faith but rarely the corresponding virtue; they have a greater measure of the virtue than of the Faith. As one Catholic blogger puts it, the next few centuries are going to be very interesting. I hope enough Christians are around to be interested.