There is definitely some truth to that. Seeing as Juventus have won the Serie A more times then any other club, it is bound to generate jealousy amongst other clubs and fans.
Juventus are also hated for always having 'no friends'. Any Juventus die hard fan will tell you that no club is friends with Juventus and Juventus is certainly friends with no rival club, in Italy at least.
Juventus' fierce rivalries have all been born from being better then the people who dislike them, its good to be hated when the reason they hate you is because they envy you.
Over the last few years this might not have been the case, but most sides jump at the chance to try and beat Juventus, since more often then not, they would have been humiliated by the old lady in the past.