This picture of protestors in Mar del Plata accompanies this New York Times article .
Regardless of your opinion of George Bush, of free trade, or of the war in Iraq, it’s impossible to sympathize with people who parade under Che Guevara banners. Guevara was a murderous, hateful creep.
If his many fans are ignorant of this fact, there’s every reason to suppose that these protestors are equally ignorant of the positions they espouse. And I recommend that they read this superb essay  on Guevara by Alvaro Vargas Llosa.
If, on the other hand, they actually know about Guevara, then these people, too, are hateful.
Either way, they deserve no respect.