The PowerLine guys add in some interesting commentary on other points of view that don't acknowledge the errors of those times, particularly the New York Times and their reporter who served as the "hero" of the movie The Killing Fields (played by Sam Waterston) who blamed the US for the genocide, not the communists. They still haven't acknowledged the genocide they enabled. The author of the piece you link to has acknowledged how wrong he got things back then and argues against repeating the same mistakes now. The rest of the DBM hasn't gotten that message.
Maybe this is an opening shot in the battle to retake the rhetorical high ground.
That has to be our most important argument right now. We won't let them make this Vietnam because in Vietnam THEY caused the enslavement, torture and slaughter of millions of innocent human beings. And they still think that was a good thing. We have to rub their noses in the atrocities committed in their name.
Hillary and Bill. John Kerry. Charlie Rangel. Walter Cronkite and every F'n reporter on the air today. They and their "anti-war" allies all have the blood of millions on their hands. Every time they open their mouths we must shove this down their throats.
We've got to trot out the clips of "peace" groups singing "all we are saying is give peace a chance" back in the Vietnam era then switch to pictures of the victims of the killing fields, then show pictures of the Iraqis with their purple fingers and ask them what kind of "peace" they are talking about.