Utter and complete BS right there. The vast majority of troops arrived via chartered civilian aircraft, and landed at civilian airports. From there, they made connections on other civilian airlines. Just like today.
The only difference today is that returning troops at least get a round of applause when deplaning. Any spitters would be quickly handled by patriotic citizens and airport cops.
In 1972, I remember landing in Oakland and then catching a flight home to Phoenix from San Francisco airport. These weren't military bases. It was on that flight from San Francisco where a young hippie couple decided to humiliate me because I was required by regulation to wear my uniform when traveling. But hey, what do I know? I'm only a veteran not a brilliant Leftwing journalist trying to impress my boss with my anti-American/anti-military psychobabble.