He started being super nice afterwards. Calling me honey and sweetheart, saying that he loved me. Even started making the bed. Is it normal for this to make me so mad?
Radical acceptance of the disorder is part of managing our own emotions, but in my experience, it's tough to get there when you've been broken down for many years living with abuse and well, insanity.
From what you've shared here, your husband seems to experience very clear episodes of splitting. Does that seem accurate? If so, that could mean he is trying to appease you when you're angry without understanding that his behaviors are the cause (too much shame in doing so).
Because he is not truly grasping the cause, you are left with behaviors that might be nice in theory but feel invalidating given the source of your distress and his ability to take ownership. It can feel very much like living with two different people, altho this is not always true -- towards the end of my marriage my husband split me black and we stayed there indefinitely. There were no "tender cycles," just more or less contempt and disdain directed towards me with periodic stretches of simmering tolerance.
Radical acceptance of the disorder and the symptoms your husband experiences will also help you focus on what you can control and what you cannot. He is likely going to stonewall. Every. Step. Of. The. Way.
Talk is cheap
As angry as he gets, as erratic as he behaves, as irrational or impulsive or abusive he may be, he is afflicted by the disorder -- he's on a nightmare emotional roller coaster and he's barely hanging on. Someone so tortured will not willingly want to give up marriage. He has also learned that talk = talk. Discussion of divorce has led to ... sleeping together. This isn't irrational to someone like your husband.
Two thoughts come to mind -- whether one or the other or both apply depends on what your husband is like.
One is that he is using this time to placate you so that he can get lawyers organized. This has happened to members here. Or, since you mention abduction, he is figuring out how to get your child out of the country.
Two is that he knows you aren't assertive and is acutely aware of your Achilles heel. He may stonewall and obstruct as a form of aggression, knowing that you struggle with assertiveness.
It's possible he is doing both.
What are your thoughts, knowing him as well as you do?