There's a distinction between a criminal regime and instances of war crimes committed by a country's army. When a country's leaders organize the deliberate and purposeful extermination or forcible relocation of an ethnic population, that's a type of criminal regime. (There are other types, of course.) I would apply this standard to Andrew Jackson, Hitler, and Milosevic, and to the American, German, and Yugoslav governments under them. So while the Luftwaffe and flak gunners didn't kill any Jews themselves, they protected an illegitimate regime. Same for Zoltan, same for the US troops deployed outside the removal operation (for instance, the troops sent to menace the South during the nullification crisis).
When individual units or troops commit war crimes without the authorization of superiors, that's a separate issue. I would have rather seen Calley and his troops face trial in an international court, but there wasn't one then. There is one now, but the US is not yet party to it. I wish it were.
I think there may be evidence that the Bush administration was a criminal regime. I would not have fought for Bush.
I still don't know how to judge Zoltan, though. I'd say the same for a soldier in Iraq or a Luftwaffe pilot. I can appreciate his achievements, but I still raise questions about the morality of them.