Stuck in the middle

Sent an email to my psychologist on the weekend to see about getting an earlier appt than had been arranged. The domestic situation between my daughter and David has exploded in a great shit fight, and it appears I'm caught right smack in the middle. They had a huge argument with each other when I wasn't here and (although it's from my daughter's account of it) David viciously attacked my daughter verbally. Thing is the argument was about me. Now I just don't know what to do. A discussion with the psychologist to help clarify things seems a logical step.

Daughter is incredibly upset at what he said and never wants to see him again, wanting me to tell him to move out. Although that may be the first initial reaction and she does have a habit of over reacting. David is used to it appears, the sort of arguments that he had with his schizophrenic ex where the viscous insults flew thick and fast in some kind of trench warfare, and although the odd occasion when we have argued in the last year there's been a glimpse of this side of his character the only time I've seen it in full flight was when he was still with his ex in Surry Hills. They argued like cats and dogs and one of the reasons I told him he needed to get out of there was because the arguments were so heated that I was expecting it to get violent between them at times. 

By my daughter's account this occasion David was in full flight. What she related to me about it sounded terrible, and certainly not in any way what she deserved. It's like he just snapped somehow. When he's like that he brings up shit completely unrelated to whatever the disagreement is about and goes full on attacking the person, like with his ex. She said she was in shock, shaking at what he was saying. We talked yesterday my daughter and I and she was crying and so upset. Poor thing has tried so hard these last few years and to have someone do that to her, attack her personally like that, I just can't believe it. What was he thinking?  I know he's been under a lot of pressure in the last months with the discrimination thing and the resulting financial worries, but there's no excuse for behavior like that. As I said to him yesterday, she's my daughter, not an enemy.

The only thing I can think with David is that he goes into some kind of auto rage/snaps and carries on like he's in trench warfare with his ex. That may have worked for him in that situation but it's not going to work here. Either that or he's got some kind of anger problem. Seems like he just thinks that's the way he is if he "turns" and it can't be helped. I'm suspecting that if he can't or won't address the issue then this may very well end up leading us to split. I simply can't have someone doing that to my daughter.