Why do some people think that christianity came from zoroastrianism?

Why do some people think that christianity came from zoroastrianism?

Because it did -- and it's quite meticulously documented:

http://www.sullivan-county.com/z/zor3.htm
http://historicaltextarchive.com/sections.php?op=viewarticle&artid=754
http://www.pyracantha.com/zjc3.html
http://www.zarathushtra.com/z/article/influenc.htm
http://www.geocities.com/Pentagon/6315/religion/zoro.html

But also be aware that Judaism and Islam also share this influence.

They have a lot in common.

There is a lot of evidence, actually, that most religions are related to each other.

My theory is that God started multiple religions on earth, for multiple cultures.

Logical deduction considering the facts. Christ was born of a virgin mother on DEC 25Th, performed miracles, feed the poor, walked on water....all done before him by various others, Zorastrians among them.

Because of the idea of opposite good and evil spiritual powers, which so far as i know is first known to have appeared in that religion. Zarathustra was also born of a virgin and there are angels. It?s really quite similar, and a sort of prototype for Abrahamic religion.

All dialectic monotheistic religion did.

Because they're mad.