Even those who remember the past...

...are sometimes fated to repeat it.

From Remembering Hypatia comes the story of the Great Library of Alexandria, final repository of all Greek and Roman knowledge. Seems its last Librarian, Hypatia, was killed in 414 AD by fundamentalist Christians; the library itself was subsequently ransacked and torched. The last of its books were burned to heat bathwater by invading Islamic troops in 646 AD.

Don't say "it can't happen here". That's what the Good Germans said in the 30s...