Only if you think violence is never justified ;)
It's a warning to rationalists, especially Hollywood Mister Spock type rationalists, that even though promoting true beliefs is a charitable act on par with patching up someone's slashed tires, people will often take rather unkindly to it.
(Since there didn't seem to be one for this month, and I just ran across a nice quote.)
A monthly thread for posting any interesting rationality-related quotes you've seen recently on the Internet, or had stored in your quotesfile for ages.