Why are Christians always attacking those who they do not understand? Pagans/Wiccans in particular.?

Christians claim that Witchcraft (which comes form Anglo-Saxon words meaning Craft of the Wise) is evil. so, if it's evil, why are so many of the rituals & symbols in Christianity borrowed from Paganism & Witchcraft (the cross, "communion", the idea of prayers/hymms being used to bring about change, holding hands to form a "prayer" circle, etc.) ? for many years, Christianity & Wicca "lived" together harmoniously, with some priests performing the same rituals. why are these rituals considered, now, evil? why are we called devil worshippers when the devil is a christian creation to be the evil opposite of their benevolent God? if christians would be willing to open their eyes & their minds, they'd see that we are trying to coexist with everyone else peacefully. our "law" states "an it harm none, do as thou wilt" meaning that it is against our religion to harm others. Satanists, on the other hand, are NOT Wiccans. they are to christians as their devil is to their God. can't we get along?