Out of Osama’s Death, A Fake Quotation is Born

This quote has been making the rounds:

“I mourn the loss of thousands of precious lives, but I will not rejoice in the death of one, not even an enemy.” – Martin Luther King, Jr

But it appears to be made up:

A quick google search turns up lots of tweets, all of them from today. Searching Martin Luther King Jr. quote pages for the word “enemy” does not turn up this quote, only things that probably wouldn’t go over nearly so well, like “Love is the only force capable of transforming an enemy to a friend.” I’m pretty sure that this quote, too, is fake.

What’s fascinating is the speed of it. Someone made up a quote, attributed it to MLK jr, and disseminated it widely, all within 24 hours. Why? What do you get out of saying something pithy, and getting no credit for it?