John Wayne like any other American had the right to promote his opinion. Period. ...
Now, the film is as accurate as any other Vietnam film made in that last 30 years because films are created to promote an opinion. (I've known Vietnam Vets who were not dope smoking, gun-totting genocidists.)
As far as action and commitment, the Green Berets succeeds as a solid "war film." No one who cares about good film making can argue that, unless they believe in censorship. The film is panoramic and energetic in cinematic quality. The characters are strong male types (like Vets I've known.) The film chose its side and promoted it. There is one strong element that the film brings home. The US military was better at killing, and it had to be. Most US detachments were generally outnumbered, fighting an opposition armed by numerous totalitarian countries from Europe to Asia. That is a historical fact, which interestingly enough, was introduced into a film over 35 years old.
The Green Berets, again, is a solid war-film and interestingly enough, is less fancifully than Platoon. The Green Berets is worth the time to see.