Che Guevara, leftist mass murderer

The Statesman has a recent article on Che chic. It reminded me that I had previously written about how Che Guevera was a mass-murderer. Che was the executioner in a dictatorship that murdered people Castro felt might threaten the Government. Key Che facts:

• Chief executioner for the Castro regime, responsible for the murder of thousands
  
• Was appointed Cuba's Minister of Economics in 1960; within months the Cuban peso was practically worthless.
  
• Was appointed Cuba's Minister of Industries in 1961; within a year a previously prosperous nation was rationing food, closing factories, and losing hundreds of thousands of its most productive citizens, who were happy to flee with only the clothes on their backs.

So what are we to make of people who go around adoring the current Liberal icons (like Hillary and Obama) while wearing a T-shirt that declares support for a mass-murderers with a beard? Are they idiots or dangerous ideologues? Or both?