I haven't seen Jodi's Mom glaring at the Alexanders; as a matter of fact, at least one reporter mentioned that she appeared "visibly shaken" as she left the courtroom after the VIS. I think that Sandy doesn't believe her daughter's lies and is horrified by all of this. HOWEVER. Put her in her twin sister Sue's company (Sue being the one who posted that tweet on the previous page about the Alexanders and contempt) and it's a different story. When Sue wasn't with her during the trial she was quiet and unemotional. With Sue by her side she was animated, laughing, and quite unprofessional and disrespectful for a court of law; and a capital murder case at that! Sue is much more the Alpha Female, and I see a lot of Jodi there.
It's Sue that's been the most horribly vocal about her niece, especially that despicable post she made on the anniversary of Travis' murder about it being the anniversary of her niece successfully defending herself against her attacker and how it showed domestic abuse victims that sometimes their abusers got what they deserved. She seriously put that out there. She seems the most like Jodi to me. Jodi's "advice" to victims of domestic violence was to "document everything" (instead of LEAVING or GETTING HELP). Sue's message to the abused is that sometimes you can successfully KILL your abuser (and isn't that an awesome thing?). She's all cuddly with the fine folks at JAII and knee deep in the fund-raising shenanigans.
Arias' siblings were also quiet at first until Auntie Sue decided to go on the offensive against the Alexanders. I don't blame them too much, as they're young and have Sue as an example. And frankly, they're being attacked on a daily basis online, really nasty stuff. I understand their anger, but I think it's misdirected. Sue just eggs them on.
TL;DR: Sue's the nasty, low-class villain in that family tree, second only to Jodi. IMO, MOO, etc.
Miss Judy... My biggest problem with the mother is that she tried to sell those forged pedophilia letters to National Enquirer. I do agree that Sue is the pot-stirrer.