I mean for those of us with mixed ancestory, some mish mash of European countries plus anything else - as one example - we often cannot simply claim to our own satisfaction 'I am a Celt' or whathaveyou and follow to the best of our scholarship the rituals, etc. of the Celtic religion. It has been too long since our ancestors had their religion tortured, killed, suppressed 'educated' out of them, to draw such a straight line. So we go by feel. We may feel an affinity for Native American religions, but it would be odd, unless we clearly felt reincarnated or had some significant blood or upbringing in Native traditions, to take up one tribes beliefs. So we choose from amongst beliefs we resonate with - nature based, often magic based beliefs and rituals - ones we make, find ourselves or ones others with similar needs found and made. Religions are not static things anyway. They changed over time. Speaking of Native Americans you can see what a wild diversity came out of groups that were members of the same group not too long before. Individual shamans, etc. brought rituals and stories and practices into the group and religions evolved, even if they kept certain underlying principles.
Attacking wicca because people created it is silly unless one wants to attack all religions this way...
