Only just read about the "rape" comments. Well... vampires have been given a sexual connotation since Stoker's book. I guess you could call the vampire bite a rape of sorts, in that it's an unwanted invasion of personal space and, in this case, probably of the spirit (assuming the family comes back as the undead and Gabriel doesn't just turn them into raisins).
All that notwithstanding... it's Dracula. I'd say this kind of violence is a given.
And if Cox hated the God of War comparisons before... well, playing as a "bad guy" with a tragic past isn't going to help that any.
My main question is, if Gabriel wants to be freed of his immortality, and is extremely decrepit and on the verge of death when Zobek saves him... why wouldn't he just, I don't know, dash his own brains out or something? It's weird that he would be in need of saving, yet unable to die, then just go along with a guy who stabbed him in the back hundreds of years earlier.