He could have been America's sweetheart and Jimmy Stewart's girlfriend for all I care, but that doesn't exempt him of what he did later in Cuba, and doesn't justify people sporting shirts featuring him in 2017.
Pinochet's coup in Chile was largely supported by the local population, he even received the U.S. stamp of approval and plenty of C.I.A. support, is it OK to sport shirts with his face now?
Legally? Yes, it's OK.
Morally? Well, morality has always been a tricky thing.