Secondly, Bellarmine, AKA the writer who got the crap kicked out of him and whose wife was raped by Alex and his droogs in Clockwork Orange, was the stereotypical church head, there to lay down the law about Galileo's ideas and give him an injunction in Rome (whereas, 1. There was no injunction at least that Galileo remembers and if there was an injunction, it wasn't given by Bellarmine, 2. It wasn't in Rome, wasn't it at Galileo's house?). I saw no friendliness exchanged between Bellarmine and Galileo in the movie... that would have complicated things, right?
Thirdly, I didn't read Galileo's daughter (shame on me) but didn't you, Prof. Bary, mention that she died shortly after the 1633 trial? What was she doing still hanging around and cooking goose livers? More importantly, the bit of Galileo's daughter I did read said Virginia never married because Galileo didn't have the dowry, not because her husband to be flipped his lid about Galileo's opinions. More importantly (and this relates to Galileo more than the would be hubby), Galileo's opinions of the poor were, in real life, not very admirable... he looked down on the poor. If I remember right, in the movie, didn't he sort of sarcastically chastise Virginia's fiancé for being such a stuck up rich guy?
Anyway, bottom line is that the whole thing was super oversimplified for sake of antagonizing and protagonizing certain characters (ahemma hem) all for the story. I'd imagine the actual Galileo story on screen would be pretty confusing, disappointing and disheartening for everybody. Too many actual characters... and it would take a semester to get through. :)