Professional Armies

It is amazing that we have a group of civilians in Iraq right now that is killing people. If nothing else, should international law not apply to them? Why isn't INTERPOL rounding them up and putting a stop to their trigger-happy forays? The Romans used professional armies when they began to decline. The European nation-states also used professional armies for a short period of history. However, it has been shown that it is almost inevitable that a force fighting for personal causes almost always defeats a professional force no matter the odds. Blackwater is a professional army that our president has employed to increase somebodies profit margins, and be able to wipe his hands clean of accountability for all of Iraq. Am I alone in finding this to be a complete shame upon our country's honor? Am I alone in thinking that this is something that almost deserves the recourse that is almost inevitable for the actions that have been allowed to take place in the name of American "Freedom"?