Unimportend, yes of course. But the masses are not as dumb as some people claim. Perhaps american masses, because some of them are the most naiv people of the world. But german masses learend there lesson. I think in our country a mass feeling like fear are not possible anymore. (Except somebody nukes one of our towns).

1. Nobody would believe the news first
2. Everybody would compare this news to the swineflue news and say hey they exaggerate it again.
3. Some small groups will go crazy
4. The most of the german people would be happy if there are aliens. They would hope that some of them will destroy the Kanzleramt and kill all politicans like in Mars Attacks
5. Ok, in America some crazy religious groups would commit suicide, other would begin to rob town, only because they can

This are assumptions, too. But you begin with non proofed facts. So, here I am with my unproofed "facts".