> why shouldn't we have international laws that deter this kind of behavior?

Well in that case why not outlaw spying too, while we are at it?

The point is, nations have spied on each other forever, and these cyber methods are just another form of spying.

When companies get hacked they always make it sound like it is a law enforcement problem, as opposed to their lax security policies. No, these companies need to be held accountable; don't let them divert attention away by saying it is a law-and-order type issue.