Yeah, truth is, they (the pro-communist "Veterans for Peace") were supporting their comrade (Obama) in the 2008 election.
From your link: "Veterans for Peace", a large national organization made up of veterans of every war, from Korea to Vietnam and Iraq, led a protest in the streets of St. Paul against the Republican National Convention. Among the members of Vets for Peace, there is a sizable contingent of Vietnam War vets. So, too, is the man they are demonstrating against: the presumptive presidential nominee John McCain."