So let's say you are in Israel protesting the plight of the Palestinian people.
The Israeli army finds a tunnel where bombs have been smuggled in. The army decides to destroy the tunnel with a bull dozer.
You and your peace niks decide to protest at the site and a bull dozer accidentally runs over you and kills you.
Who do you sue?
Well, you could sue the Palestinians for building the tunnel in the first place; except that Palestinians have no money except for Yasir Arafat, who's already dead.
You could sue the Israeli Army, but chances are good they'd send the Mossad to take you out and you don't want that.
Well, if you're the family of Rachel Corrie, you sue Caterpillar, Inc., who manufactured the bull dozer in Peoria Illinois.
If you wonder why businesses take their production elsewhere, consider dealing with this caca.