Jesus was not supossed to die, but since he did, Paul needed to re-write the story, even if it made no sense. 2 billion people today buy Paul's version of christianity.
It reminds me of 1914 being the end of the world, but since it didn't happen Rutherford re-wrote the story, which became Jesus parousia. Today 7 million people buy that story. In theological terms, not much difference between JW's and other christians. They both go for non-sense as long as you can insert the word LOVE somewhere.