Sometimes "they" do almost all the work for us.
When a bacteria causes panic circa the 14th century (via wikipedia)...
As the Black Death epidemics devastated Europe in the mid-14th century, annihilating more than a half of the population, Jews were taken as scapegoats.
Rumors spread that they caused the disease by deliberately poisoning wells.
Hundreds of Jewish communities were destroyed by violence, in particular in the Iberian peninsula and in the Germanic Empire.
In Provence, 40 Jews were burnt in Toulon as soon as April 1348.
"Never mind that Jews were not immune from the ravages of the plague; they were tortured until they "confessed" to crimes that they could not possibly have committed. In one such case, a man named Agimet was... coerced to say that Rabbi Peyret of Chambery (near Geneva) had ordered him to poison the wells in Venice, Toulouse, and elsewhere.
In the aftermath of Agimet’s "confession," the Jews of Strasbourg were burned alive on February 14, 1349.
When a virus causes panic circa the 21st century (via Michael Savage)...
"Illegal aliens are the new carriers of the swine and avian flu from Mexico... Make no mistake about it, this is a disaster."
"I advise you to listen carefully because what you learn here, you will not learn on any other talk show. That is because I have an actual PhD. in epidemiology, human nutrition and medical anthropology from the University of California-Berkley. Does that make me the worlds leading virologist? Not at all but it certainly makes me aware of what's going on.
Let me remind you in 1986 I published a book called Maximum Immunity which was translated into 16 languages. So just understand I'm not a disc jockey with a golf club."
"If we lived in saner times... the borders would be closed immediately."
What does it say when 700 years pass and disease evolves faster than the "conservative" mindset?