Ex being extra toxic

my ex and I seperated in February.

This was initiated by me because of years of disrespect from his side. Years of conversation, including begging and crying and the suggestion of therapy didn't fix his disrespect towards me, so I left. (I live in my own apartment since February)

He's been dating for MONTHS now.. He even literally fucked up our sofa (a panel broke down and hangs on the floor and it supposedly happened during an '18+ session') I joked about it and congratulated him 🤣

Now.. I've been seeing a guy, which he knows about. (I keep him posted because having him blindsided will make him angry and I'm a bit scared of his behavior still, especially the effects it would have on our kids) and he's been seriously jealous.

So I had my guy over on Monday but before that, I was at work.

When I was leaving he called me about a miscommunication and he expected me at his house for the kids.

I told him that wasn't agreed upon and I can't because my guy is coming over.

My ex was like "ohh you gonna do.. nevermind I don't even want to think about that" and in writing this seems very quite normal but he sounded very very angry. Like I'd just cheated on him.

I know he still wants me back but seriously.. he has someone else.

@Casey

he was angry at the thought of me being intimate with another man.

no doubts. our conversation wasn't held in English. it was very clear why he was angry

@Realist

Because he has no right to be angry at me for moving on, especially while he's with someone for almost half a year.

I also haven't been intimate with this new guy yet, so that's something that lives in his head only.

Explain to me why that isn't toxic?