Well, I dont see how the Wiccan Rede is consistant with relativism.
In relativism, there is no north star, a fixed point by which all can navigate...no absolute principle which is the same for everyone.
The wiccan principle of 'evil' or 'wrong' does have a fixed definition....the will to harm.
It's not completely relative, but it is more relative than other ethics systems out there. It doesn't make prohibitions on various personal tastes or ideas, or anything; it only advises the follower to not will harm on others or self. However, even that is dependent on the circumstances on the incident, and on if greater harm is done by inaction.
The route that causes the least harm is best.
That and the notion of an invisible karmic fate has more to do with Hinduism and Buddhism than any pre-christian pagan tradition in europe.
Keep in mind, though, Wicca is based on Ceremonial Magic and folk mythology of the Indo-European peoples, a broad ethno-linguistic group to which Hindi people belong, along with the Hindu religion. In many ways, Hinduism is the closest we have to Proto-Indo-European religion.
Wicca was dreamed up sometime in the fifties and sixties by hippies who came in contact with English translations from eastern mysticism.
Not really. You seem to be badly misinformed on Wicca's history.
Wicca derives generally from the Ceremonial Magic movement of the late 19th century, and Margaret Murray's theories on pre-Bronze age Europe, although much of Margaret Murray's work was discredited. Gerald Gardner became initiated into a small group of Witchcraft practitioners in the late 1930s, who believed in duotheism and thought of themselves as revivalists of a Pan-Indo-European religion, called the New Forest Coven. He was heavily influenced by this group, and developed his ideas throughout the 1940s, during which time he gained a position of high standing in that Coven.
Effectively, "Wicca", and its traditional beliefs can be traced to the 1947 publication of Gardner's
High Magic's Power, which was essentially a codification and publication of the New Forest Coven's beliefs. The traditional date for Wicca's beginning is 1954, with the publication of
Witchcraft Today. Wicca spread even faster after Gardner's death in 1964, and grew to encompass half of the neopagan community in Britain and America.
However, Wicca's beliefs were far and away from the Hippie movement of the mid-1960s. The only connection between Hippies and Wicca stem from their shared environmentalism. Wicca's theological and spiritual beliefs were influenced by the New Age movement, of which the Hippie movement was a part, but they weren't shaped definitively by it. Wicca's basic, underlying beliefs can be traced directly to the New Forest Coven and Gerald Gardner in the 1950s.
EDIT: Sorry, in my haste to type, I forget a few key letters and suffixes. Sorry for any confusion.