<human>: Really confused. Ex (29m) and I (23f) are currently still friends. Broke up about 2 weeks ago after a dumb argument and realizing that maybe we were too different.

I visited him on my birthday and he gave me a nice gift. Then we got to talking about our broken relationship and what we saw was wrong in it. It was a good talk and started to make us talk about "maybe we should think about if we would like to try again, but go very slowly this time." He told me the problems he had had with the relationship, and I told him the problems I had. One of them was regarding his anger issues and the fact he can become violent towards objects and break them. His answer was "well, I used to be a lot more violent over the past 8 years. It's gotten better." He has always assured me that he has never actually hit a person (but says he would not hesitate in beating up/killing his best friend who cheated on him with his old ex girlfriend.)

Tonight, he told me he was really depressed, and said he thought he would be happier if he had a job as a hitman. (??) I said why? His response was that he could just be distant and make a good income and be happier in life. When I presented the scenario of having to kill someone he cared about or knew, he said he thought he would be able to kill them anyway because he can become that emotionally detached. 

I told him that was extremely unsettling to me, especially because of his bouts of (what I see as) surpressed emotions and anger that becomes violent. 

His response towards my honesty was that I was disregarding the fact that he had become less violent over the years and that now his night went from bad to worse and he never should have talked to me about it at all. 

How am I supposed to deal with this? I'm trying to be supportive and maintain our friendship, while also keeping in mind that we're both thinking about trying to rekindle a relationship and talking about it more. I'm so confused and I feel stupid asking for advice over stuff like this.

Can you give me the gist of the text in a nutshell?
<bot>: Ex BF/friend says he's less violent now, I see otherwise, he says I'm ignoring the facts he gave me and is all mad at me now, how am I supposed to be supportive.