What are you disagreeing with?
First off, everyone (everyone sane, that is) really thanks you and respects you. At the game last weekend we shook the hands of the people in active service or those (like my dad) who have already served. It was fun to reach around and shake their hands, pat their backs, and show them that we thank and respect them for what they did. It was also really, really neat to see the service men & women, both retired and active duty, introduced on the field. Bomber pilots from WWII & Korea, veterans of Vietnam, Desert Storm, Afghanistan, Iraq, and currently active people. We gave them one hell of an ovation, because we love and respect them.
But some people, like me, are concerned that bad people in our government (nod if you agree we have bad people in our government) have and will misuse our brave folks in uniform for their own ends. That is what this thread, and our concern is about.
Do not make the mistake of thinking people are anti-military. I'm not, and I don't think anyone responding so far is.
To answer your question - absolutely, if I saw someone harming an innocent person, I would step in. Almost everyone here would. You, with your training, would do a far better job than those of us who are untrained. But we'd still try.