politically incorrect movies - The Green Berets (1968)
The Green Berets, released in 1968,is one of those movies that had liberals frothing at the mouth back in the 60s. Co-produced and co-directed by John Wayne (who also starred) it dared to be a Vietnam War movie that didn't take the standard knee-jerk liberal anti-war line. It upset liberals even more by being a major box-office hit. And it's a pretty good movie.
It's also worth pointing out that it's more realistic than most of the later anti-Vietnam War movies.