The guardian: Today something causes cancer, tomorrow its a cure.
First sentence says: "Drinking large amounts of fruit juice may raise your risk of cancer, according to a big study which has found a link between the regular consumption of all kinds of sugary drinks and the likelihood of developing the disease."
The link between sugar and cancer has always been there, obviously consuming large amounts or excessive amounts of anything is not good for you. People generally know the risks, but choose to ignore them based on their preference and perception of the risk.