Hmmm I'm not sure 'calculated' is the correct word. Cold. Certainly. But I do think they live in the moment. However that moment can turn in the blink of an eye.
An example of my abuser, something he did regularly.
Me: Hey, I've been invited to such a place with X on Friday night. I know you're at work, but if you could come along that would be great.
Him: Oh, I can't, I'm working but you should still go.
Me: Ok, cool.
Off I went.
Me (upon my return): Hey, how is work going? I've just got back from Y, had a great time. Would have been ace if you had come along.
Him: Have you just got back now?
Me: Yes, it was fun.
Him: Are you taking the fucking piss out of me?
And that was it. Completely flipped. Please note that whenever I went anywhere, i always told him where i was going, who i was with, I never drank, I mostly drove myself to social occasions and I was always home by 10:30pm. I realise writing this how infantaslised I sound. But it became a pattern when I got asked to do anything with friends at the weekend. And so I made sure I was on my best behaviour. It still wasn't enough for my ex. He would rage at me, call me names, swear, shout. And then after all that, I would get the silent treatment for days on end. And then normal would resume. Then the process would repeat. I didnt see the pattern at the time.
Even after we split I was defending him to people. And he still raged at me. He is broken person.