I think that is too over-simplified. Try seeing jesus as the final upgrade of the dying/resurrected vegetation god ( you don't have to go all the way to Egypt...Tammuz and Adonis click the names - will serve nicely. Tammuz was local and Adonis was brought along with the Greeks.
Put another way, Tammuz is Vista, Adonis is Windows XP and jesus is Win 7. Except Win 7 actually works.
Put another way, Tammuz is Vista, Adonis is Windows XP and jesus is Win 7. Except Win 7 actually works.