Somali Piracy and Multiculturalism

If all cultures are equally valid and morally equivalent, then why can't our response to the Somali pirates be the one their culture would practice? Or is there some kind of inherent contradiction in secular humanism, moral equivalence and multiculturalism?

A culturally valid and morally equal response to Somali piracy.
I'd write more, but it's time for me to go to my Kwanzaa preparation classes.