Dying for Liberation: Why is PETA killing animals?

From Wesley J. Smith in today's National Review Online:

The People for the Ethical Treatment of Animals (PETA) is one of the world’s most successful and effective advocacy organizations. Dedicated to the “rights” of animals with a devotion so fierce it borders on fanaticism, PETA activists practice propaganda as an art form and are so skilled at in-your-face advocacy and agitation that executives of the world's most powerful corporations cow when the PETA activists pound on their doors.