Ofreen, from my point of view, "The motorcycle diaries" is more of a historical movie rather than political. The name "Guevara" doesn't appear at all, and you find yourself through the movie without thinking that the youngster on the film was going to be the bearded man in a million of t-shirts. If instead of Ernesto Guevara the journey would have been undertaken by a perfect unknown, the movie would still have been good in my opinion. Back then, Ernesto Guevara was not a revolutionary but an student in medicine, so you have to take it as it. In fact, the script was written based on two books describing the journey written by both Guevara and his travel mate -I can't recall the name now-, so there are reasons to believe that the script follows what really happened -if we trust Ernesto and the script writers were faithful to the facts-
I would not mind at all to see a movie about Hitler's young days, not even one about Hitler's worst criminal days. Not even about Stalin, Guevara, Castro -wait until he dies and there will be a plethora of books and movies about him-. It's not only politics; it's also history. I can see a movie or read a book about a genocide without having an implication I support what he did.
Raul