Is "taking it out on other people" the same as physically attacking them? Because she could have killed these young people if they hadn't defended themselves and banded together. She might have snuffed out their entire lives because she felt shitty!

I genuinely feel bad for your dad and for this lady. It's terrible and it's unfair. But, like anyone dealing with something chronic, it's also their responsibility to manage. If they can't, they have no business being in society with other people...