Having watched the film (ugh) again, I've gave some considerations as to the bad guys.
If I was the bad guys in this film, what I would've done would be to deploy decoys and hide as much of my main operations as possible. If my operations have raised the ire of the US Government to the point that they're going to deploy the AH-64A (or the Longbow) against me, I'm going to change things so considerably so as to assume formlessness, hunker down, perhaps get my competition to fight the US Army so that they will be destroyed or severely crippled, so that, in a few years after the Army has blown off all their ordinance and the politicians have got their political slogans so they can get re-elected, I'd come back, and I'd be wiser for the wear. If I do something again that brings back the US Army complete with Attack Aviation, I'll be better prepared to deal with that situation, assume formlessness in a much better way, rinse, lather, repeat.
Because, you see, if I fight back directly, I'm going to lose lives, material, and equipment, and money, more so than the US Army ever will and whatever they spend will be replenished in ways I can't counter or match. You cannot fight against an enemy that can deliver ordinance on your assets with impunity with the kind of assets that these bad guys in Fire Birds had, not even with jet fighters, because A) I don't have many, so I can't afford to lose any, and B) even if I win battles like this (not likely) I will lose the war. Americans do not lose wars (contrary to popular opinion, we didn't lose in Vietnam, we lost the peace we fought for). And if I manage to defeat the US Army somewhere, the US Army will adapt and come at me even harder than I could possibly imagine. So the best thing to do is to give the Army something to shoot at while at the same time preserve what I can so that I can be in business when the Army leaves.
It costs a lot of money and effort to keep any Army in the field. Armies do not make money. So they are not self-sustaining. So, really, the best way to defeat me is to kill me and my leadership, and that would require to infiltrate my organization and find me so that you can use whatever weapons that are expedient and effective, just as we did with Osama bin Laden. But, there is also the example of Pancho Villa; the US Army deployed to the American Southwest in order to find and kill him, and they were unsuccessful. After the Army left to go fight in the First World War, Pancho Villa was finally killed by someone who could get close to him and had a beef with him. It wasn't the US Government that did it. It goes to show that the Army isn't always the best instrument in which to fight fast and amorphous enemies (historically speaking, the US Army has never been good at pursuit operations anyway).