Yes, this is standard defense trial fare. In every murder trial I've ever watched it was either the victim themselves or (in the case of a child who was murdered) the family who was disparaged in some way as a defense tactic. Really, it's all defense attorneys can do to try and make their murdering client less evil. IF they can make a jury hate the victim then they (think/believe) they can get their client off or at least a lesser conviction. Most of the time it fails. Most people use common sense and most juries follow the instructions and the law to decide their verdicts.
This is such a standard strategy it's not even interesting. All the vitriol and anger is wasted because no one believes this crap and it won't help the murdering monster in the end.
It's not personal. It really isn't. I know it *feels* personal, but it's just typical defense flotsam.