Seed, I'm not going to argue with you. I think you pretty much nailed it. One big difference in Vietnam and now is that we had the draft, based on randomly drawn birth dates. You can't imagine how thrilled I was to get a low draft number, which meant I was going in the military. The rich and connected could usually get out of it but those from poorer backgrounds had a lot more problems with that.
For the record, I was not sent to Vietnam. I don't want to imply otherwise. My foreign service was in Korea.
Years back a political candidate was accused of being one of these that avoided the draft and was taking a lot of heat for it. A guy I worked with had ridden a small patrol boat all around the Mekong Delta was having none of it. He said he didn't blame him. He'd tried the same trick but waited too long to start. To his credit when his number came up he did his duty, however reluctantly. Canada or Sweden were not options for him.
Military service has long been a route for people from poor backgrounds to escape and improve their prospects for life. It helped me. I used the GI Bill to pay for most of my college. You will get some people from more affluent families in the military for their own reasons, usually as officers, but most come from more humble backgrounds. If you ever plan to run for elected office it's really good to have military service on your record. Combat service is even better.
A flag is just a colored piece of cloth, but it is a strong symbol of a country, state, organization, whatever. A flag can stir up strong emotions. The Supreme Court has ruled because of freedom of speech you cannot force someone to respect the flag, so some people use it in a way to rub others' emotions raw. They are manipulating people emotionally, not rationally.
I'll hijack the thread a bit. Ho do you support the American military? I think it begins by pressuring the people we elect to justify sending Americans into harm's way. Why are you risking their lives, what do you hope to achieve, how do you hope to achieve It, and what is your exit strategy? Sometimes national interests do require sending them into combat. There are some really rotten people out there.
An equally important way to support them is to see that they have the ability to be successful. Give them the equipment, training, and supplies to do their job. If that means giving some lowlife dictator foreign aid so we can establish air bases or transport goods across their country, you do it. You do what it takes to see that they can do their job. You don't pinch pennies or stand on principle so rigid that you get them killed. Even if you disagree with why they are there you give them all the support you can while they are there. And maybe work to get them home.
Now I'm off my soap box. I think.