Tell that to Nikko Schoch, co-founder of Veterans for Peace

"I was spit on. I was called a baby killer even though I had never carried a gun," Schoch said. "We're going to see more psychologically wounded soldiers coming back from Iraq. I hope we as a people can support them."

Source: http://deseretnews.com/dn/view/0,1249,60 0119904,00.html

The only person you'll find that rails against this apparent "myth" is Lembcke.  In fact, almost any article I've read on the "myth" of anti-veteran protestors uses Lembcke, and only Lembcke as a source.  I don't believe that spitting or harassing returning vets was widespread, but there is enough anecdotal evidence from living Vets, including anti-war vets to say that it happened.

Using your logic, we could excuse Germany's citizens for their leaderships demonization and murder of Jews during the Holocaust, since there is no evidence that normal people in towns knew about what was going on.  You will not find one German newspaper from the late 1930's or early 1940's that reported on the widespread murder of Jewish people in the country.  That does not mean it didn't happen.

I know, I know, Godwin's Law, but I'm not accusing anyone of Nazism, simply using it to prove a point.