I thought it was obvious that he would get a lot of media attention if he performed well at Parma, especially questions about Juventus. He's a huge talking point for a player who has shown just promise (on top of being labelled the next Del Piero), journalists will be all over him above any other Parma player after matches, and controversial questions are their thing. I found it funny in the FI article, "Parma midfielder Sebastian Giovinco has promised to celebrate if he scores against Juventus this season", trying to stir up some controversy.
He's not even attacking the club. Players don't take up football to be loyal to one club above all others, they do it for a living. It's his career, not Juventus'. What he said in the interview was truth though, it was the fans who got behind him but nobody at the club wanted to make the same commitment. It's not like he's saying he'll run over to the Juventus support and perform a gesto dell'ombrello.
I find it weird that fans find that players have to have some sort of honour to this club. Sort of like when we got relegated in Serie B, and a certain player who said that the players won those two Scudetti on the pitch fairly, yet he gets slaughtered by some (naming him a traitor) because Juventus sold him to the club who was offering the most money (which benefited Juventus after all).