Why Rudolf Steiner Described the Asuras Instead of UFOs

This Awareness indicates that this is particularly referring to those negative types of the Zeta Reticuli and Orion forces or aliens that have been referred to by Rudolf Steiner as the "Asuras," the Archangels of Evil, in his terminology.
The Asuras, representing the servants of the Ahriman forces.
This Awareness indicates that it should be understood that the Greys are, of themselves, extremely weak beings, but with the technology available to them, they are a highly formidable force and these entities equate to the forces Rudolf Steiner spoke of when he talked of Ahriman's followers, the Asuras, and the demonic forces that kept him in power.

This Awareness indicates that, essentially, these are much the same, but Rudolf Steiner at the time did not wish to describe UFOs and people from other places in the galaxy because he was ahead of his time, speaking on topics that were far out of the mainstream of thought and were he to discuss flying saucers and little men from other places in the galaxy, no one would have taken what he said seriously.
His discussions being given in a metaphysical framework allowed him to be taken seriously in terms of concepts having symbolic and spiritual meaning.

The entity was actually speaking of reality and tangible forces in the universe but speaking of them in ways that appeared metaphysical rather than practical in order to have his message acceptable to the people to whom he spoke.