The idea of Richbod showing clear preference towards Vergil over the Gospel or even his friends, was a controversial point as the stories of the Aeneid revolved around pagan gods and unsophisticated cultures (according to the Franks). This gave the impression that sympathising with the works of Vergil would be like sympathising with the pagans and barbarians, which was a very heretical accusation.
The idea of Richbod showing preference for Vergil over the Gospel or his friends was controversial because the Aeneid stories centered around pagan gods and primitive cultures (according to the Franks). This made it seem like sympathizing with Vergil's work would be akin to supporting pagans and barbarians, which was a serious religious offense.