You know, whatever works. If we agree it's a moral thing to do, the origin of the morality is less important. Philosophy can be debated... in a different thread.
Well if the State™ has to circumvent it's own laws to achieve some ends (which i doubt are really ends since incidents like this will continue to happen), one could argue that grounds for morality are null and void.
After all, that's what Terrorists™ do.