That's news to me. Is this actually your interpretation of the present state of affairs in the US, or is it just how you think things ought to be?
>The validity of moral imperatives and rights does not depend on the existence of any law.
That's not a point of disagreement here. The question is whether, in addition to the other moral imperatives, there is a (defeasible) moral imperative to obey the law.
>In my opinion, criminal law is just a device to facilitate obedience to moral imperatives.
Again, this is a fantasy view of the law, not one that can possibly be applied in practice. Consider theft. How are you going to determine, in every case, whether it is morally justified that someone owns something? You can always go back and find an injustice in the chain of events which leads to ownership. Or take a clear case, say, Bernie Madoff. Would it have been ok to steal from him because he didn't justly acquire his possessions?