Trinity,
If I am understanding you, Christianity 'evolved' or was 'influenced' considerably from Zoroastrianism because of what I would call--
seeming similarities. A more thorugh investigation will reveal the weaknesses in this argument-not the least of which are the
post-Christian sources cited for many of them.
Even the pre-Christian sources reveal only a slight similarity-if any at all. For a thorough refutation of these claims I would highly recommend this website:
http://www.tektonics.org/copycat/zoroaster.html
thanks,
Dave