“after the KGB files were publicized.”
You have goaded me into diving into looking up this matter.
They are still arguing about the identity of the Soviet spy who was code-named “Ales”, as in this recent article, which claims Hiss was innocent:
http://www.theamericanscholar.org/su07/ales-birdlong.html
After reading what I can find on the web, it seems to me very likely that Alger Hiss was in fact the spy “Ales”, but those who would like to think otherwise can find fragments of evidence that seem to exonerate him. What seems certain is that someone in the US delegation at Yalta was a Soviet spy, and Hiss is a much better fit to the known evidence than the other proposed person, H. Wilder Foote:
http://jeffersonflanders.wordpress.com/a-comparison-alger-hiss-wilder-foote-and-ales/
So in my eyes, the verdict on Hiss remains “guilty”, but it’s OK to question that verdict. Your point that those questioning the verdict have an hidden agenda also seems reasonable.
Many times their agenda is not hidden at all.
Look at the group International ANSWER and see who is openly on their web site.
After looking at that, why would anyone vote for someone supported by them? There are other web sites also: The daily KOS , Moveon.org, Democraticunderground.com, --- There are a bunch and they are front groups for Mrs. Clinton and other democrats.