@Dušan I admit not all of the slavic pagan faith was from Iranians, I just wrote that comment to counter the idea that slavic pagan faith was pure slavic which it wasnt. Dualism isnt the only influence of Iranian influence. The name God Bog is most certainly from Iranian as stated in https://www.britannica.com/topic/Slavic-religion. Sacraficing is also written about on the page. If you think pagans just sacrificed bread then I dont know what to tell you. Also Christians dont follow old testament but new, for us Christ is the fulfillment of any sacrafice. Christians dont and never sacraficed animals or humans.