For Neumann, presumably, the aliens were "mass man," onto whom he could project his own propensity for scapegoating.
I wanted to work that line into my Reasonarticle today, about the socialite-scapegoat Paris Hilton, but I couldn't make it fit. So I put it here in the scrapheap. (Enjoy!)
Speaking of my articles: A while back the journal Qiyamat accepted a commentary I wrote on an old Bernard Lewis book, The Origins of Is'mailism. Unfortunately, it looks like there won't be any more issues of Qiyamat. Fortunately, the editor published the review anyway, on his Ismailism Blog. The curious can read it there.