1. The first feature of Ur-Fascism is the cult of tradition.
Traditionalism is of course much older than fascism. Not only was it typical of counterrevolutionary Catholic thought after the French revolution, but is was born in the late Hellenistic era, as a reaction to classical Greek rationalism. In the Mediterranean basin, people of different religions (most of the faiths indulgently accepted by the Roman pantheon) started dreaming of a revelation received at the dawn of human history. This revelation, according to the traditionalist mystique, had remained for a long time concealed under the veil of forgotten languages -- in Egyptian hieroglyphs, in the Celtic runes, in the scrolls of the little-known religions of Asia.
This new culture had to be syncretistic. Syncretism is not only, as the dictionary says, "the combination of different forms of belief or practice;" such a combination must tolerate contradictions. Each of the original messages contains a sliver of wisdom, and although they seem to say different or incompatible things, they all are nevertheless alluding, allegorically, to the same primeval truth.
As a consequence, there can be no advancement of learning. Truth already has been spelled out once and for all, and we can only keep interpreting its obscure message.
If you browse in the shelves that, in American bookstores, are labeled New Age, you can find there even Saint Augustine, who, as far as I know, was not a fascist. But combining Saint Augustine and Stonehenge -- that is a symptom of Ur-Fascism.
And that's just the first point. Highly recommended reading.