Big difference. Those US troops were raping, plundering, stealing, murdering, and invading the homes of their fellow citizens in their fellow states.
Once again, if a U.S. soldier is in harms way today fighting enemy nations I'll be the first to stand up and praise him. If he becomes the object of a tyrant and turns his guns around on my state, my city, my home, and my family though and starts firing with the object of killing, raping, looting, and plundering I will exercise my God given and constitutional 2nd amendment right to bear arms in my own defense. In that regard, I don't care who he's a soldier for anymore be it Al Qaeda, Caesar, the King of England, or some dictator tyrant who illegitimately usurps the Constitution and turns the U.S. army against his own citizens. The fact that he is shooting at me for illegitimate reasons gives me a right to self defense and that belief was shared by every one of the founding fathers. So quite frankly, I find it disgusting that YOU shun the legacy of the founding fathers and their avowed belief in the right to bear arms by impugning the name of those who share in that belief with fraudulent associations to Al Qaeda and other mohammedan scum.