This is what was reported at that event:
http://en.wikipedia.org/wiki/Winter_Soldier_Investigation

Testimony given during the three day event covered both broad policy concerns, such as the use of chemical agents, indiscriminate bombing, and free-fire zones as well as more specific and unusual war crime incidents, including rape, torture and desecration of the dead. … While only 109 veterans gave testimony, over 700 veterans attended the hearing. Excerpts from the testimony transcripts:
Stephen Craig: “…My testimony covers the maltreatment of prisoners, the suspects actually, and a convoy running down an old woman with no reason at all…”
Rusty Sachs: “…my testimony concerns the leveling of villages for no valid reason, throwing Viet Cong suspects from the aircraft after binding them and gagging them with copper wire…”
Scott Camil: “…My testimony involves burning of villages with civilians in them, the cutting off of ears, cutting off of heads, torturing of prisoners, calling in of artillery on villages for games, corpsmen killing wounded prisoners…”
Kenneth Campbell: “…My testimony will consist of eyewitnessing and participating in the calling in of artillery on undefended villages, mutilation of bodies, killing of civilians, mistreatment of civilians…”
Fred Nienke: “…My testimony includes killing of non-combatants, destruction of Vietnamese property and livestock, use of chemical agents and the use of torture in interpreting prisoners…”

I’m not sure what the basis of you claiming that ‘nobody reported crimes to him’ is.

Surely, it can be agreed- regardless of your opinion of the war’s justifications- that there were instances of crimes. It could only be expected if you have 500,000 young men- to say nothing of the difficult situations in which they found themselves.

The core message of the left to any individual is you are a victim, you are oppressed, you need our help, your failings are not your fault. These all run contrary to the general military philosphy which says the individual is powerful and that the individual is personally responsible for his or her actions.

To a man every Viet Nam veteran I know hates John Kerry for his blood libels against the other officers in his own unit as well as all other Viet Nam vets.

Strawman

Lord, I know it’s not worth trying, but:
Every person wants to be relevant.
This includes people who join the military.
To make the military ‘relevant’ requires an active military policy.
Republicans pursue a more active military policy.

I’m sure if you survey the State Department and the Diplomatic Corp it would lean Democratic because Democratic leadership gives more relevence to the people working in these positions.

But you can rely on your stereotypes and self-congratulating hypotheses if you prefer.