I think it was the idea that some people could avoid the draft while it seemed to fall on others who didn't qualify for a deferment. I don't know if they did that during WW2 or not. In my grandfather's time (between the World Wars), he was able to buy his way out of the Army. I think they ended that sometime before WW2 but I'm not sure.
I don't think the general public totally bought into the whole idea of "containment" as a viable foreign policy, nor did they really go along with the Domino Theory or similar views which considered situations like Vietnam as a genuine threat to US security.
That may be part of the reason why some didn't really consider it to be shirking their duty to defend the country, since the country was never in any real danger, at least not from Vietnam. It was different during WW2, when people might have considered that there was a graver risk to the US homeland.
One contributing factor to the guys feeling obligated to go to Nam was the idea that most of our fathers won WWII single handed. It was a very high bar for us. This, plus the fact that we didn't have access to information as you do now so we weren't as politically inclined as today's youth coupled with a strong macho image for males at the time, and you have the perfect storm for a Viet Nam scenario. I was determined not to go to Nam, but by the above factor I felt I had to serve somewhere. Once I got into the service (Navy) I knew I would not go to Nam (unless they sent any of my shipmates over, then I would have gone even if I had to pay my own way. You tend to get close to the people you serve with.)
Given the money the Trumps have and how Donald has paid his way out of every legal challenge he's ever been in- you doubt money could have got him some leeway? Ah! You underestimate the power of the almighty dollar. I'll tell you what else about Trump I don't believe when he says it- that he actually worked for his degree from Wharton. He talks with less than fourth grade skills.
I don't discount this, but this is just speculation on your part. You can go back and check his records (unlike our previous president) and form your own conclusions. So what you're saying, I believe, is Trump is a bumbling idiot that has managed to build skyscrapers and resorts, amass a fortune, and beat the most intelligent woman in the world for the presidency. May we all be so stupid.
Don't deny any of that BUT why did he not become a conscientious objector then. There were plenty of those - didn't Cassius Clay famously do that?
Not really. Muhammid Ali declined to serve because he didn't recognize the government's authority over him (he was definitely railroaded, imho) because of his new founded religion. COs have been known to go to war as corpsmen, for example, and have shown great bravery. Ali's situation had more to do with race than choice. Again, he was terribly wronged by the government at the time.