If Che had looked like Joe Lieberman
Face it Tom. Part of the mystique about Che is that the guy was a handsome stud that got hunted down and killed, not because of his idealism. As you say very few have any clue what he stood for or the very violent acts he committed in his life.
That's a pretty weak argument to support any trend for young folks to start reading Marx and calling for a return to the very public failures of countries like the USSR. Remember, we now have very strong validation in our history for how badly a move to communism goes. That wasn't necessarily the case during those Cold War days.
The reason his face is on t-shirts is because it's a really cool image nothing more.
Art