Some excellent advice on this thread and I hope you're able to take at least some of it.
Yes, he's abusive, and a cruel sadist to boot. Plus, reading between the lines, projecting his own behaviour on to you. That notebook thing - years ago I had a beyond insanely jealous partner who specialised in mind games (thankfully only for a short time). He used to get his pants and his tiny little brain cell in a twist if I so much as dared to have coffee with my boss and male and female colleagues in the middle of the day. Turns out he was the one who was playing away...
So, he's trying to either catch you out having an affair (which strongly suggests he may be), or he's trying to find something he can gaslight or punish you with. Delete your phone history and your browser history as well, assuming you're using your phone to access this site.
His mother also sounds like an utter peach to have raised such a vindictive psychotic bully - it's no excuse that she's probably normalised behaviour from men in her own life as a survival mechanism.
This isn't the 1950s or even the 1970s any more though, you don't have to endure this and nor do your kids. (And just because he hasn't turned on them yet doesn't mean he won't.)
To help protect yourself, do you have or could you get another phone handset somehow, even just a cheap pay as you go one, and hide it somewhere he won't find it? It's obviously too late tonight, but as soon as you can.
Get your documents together, including your bank card, make sure he can't get at your car keys (assuming you drive), and make sure you have, in a place he can't get to, enough cash for a taxi or your card to get you to the nearest police station if necessary. Christmas time is always a bit of a watershed/flashpoint time, you and the kids deserve so much better than this.
Fingers crossed that you get out of this situation very soon.