Spitting at you is assault, threatening suicide is abuse.
What would I do?
I would worry if this happened to me, if there was a kettle full of boiling water I couldn't say I wouldn't throw it.
I would be beside myself with rage if someone did this to me. If I was scared of the other person and in physical danger then I'm sure self-preservation would prevail and I wouldn't attack them.
But they would be dead to me and I'd walk away and I would never look back. I would make sure I was never in a room alone either them and I would go no contact.
If you have children together I sympathise because you would have to somehow Co-parent. But I would be hyper vigilant about how he treated them and would get support from woman's aid etc on how to spot signs he was abusive to them when they were out of my sight. If I didn't have children with him I'd thank the gods everyday.