Is it normal for a dad to be a chronic neurotic loudmouth a-hole?

My mom has suffered a lifetime of semi-unprovable domestic abuse from my asshole father. He's the type that makes sure to only act like a sociopath when nobody can see him blow up. He's constantly verbally abusive to her. He's got a corrupt mind, I think. He's flat out neurotic toddler. Complains the moment he wakes up, all day long *AT* my mom, in her face all day long (she won't tell him to get lost). It is NOT normal. I've never hated anyone else except him. He's a disrespectful asshole of the worst kind. I suppose he has no idea that he just humiliates himself, not that I care, I just want QUIET. He's a lost case, imo. I wish I could find a way to get authorities involved to FORCE this asshole to respect his family. He needs medication, I believe. The asshole acts like someone with manic mood swings. It angers me deeply. I really have to stop myself from wanting to sneak up and strangle him! Won't do that, I'll end up in jail. No no. But, he deserves it. He's fought with every single one of my siblings. He's a true nutter with no sense of respect, empathy, or boundaries. Just a self-centered screw up! Its been awhile but he has been physically violent against my mom. I'd like to DO SOMETHING about it! Anyways, there's no way that asshole is normal. He's so disturbing that my mind recoils with disgust if I see or hear him. I'd like to publicly add his face to a domestic abusers wall of SHAME.