I would disagree with this assessment.

There is absolutely nothing to show that Wicca existed as a religion before Gardner created it in the 1940's-50's.

Nearly all of the rituals and laws Gardner laid down in his creation of this religion can be directly traced to other sources; Aleister Crowley, and various sects of Kabblistic/Masonic magickal works to be precise. In order to integrate these ceremonial magicks into a religon, he borrowed heavily from many sources of European folklore to provide a backdrop of myths, gods, stories, and philosophies.

None of these sources are choesive with each other; the Old Ways had no interest in or use for the kinds of structured ceremonial magick Garnder was into and the Magicks he was into (courtesy of Crowley) had no use for gods, spirits or religion of any sort.