Should I be mad new love interest wants to be friends with my abusive ex?

For context, I have know this new guy for years even while I was dating the ex I’m referring to. When I say my ex was abusive I mean in every way possible. It was really terrible for me. And this new guy, having been my friend, knows everything. He was always supportive of me and even protective in a way. They were never even very close before, but I guess more recently he decided to start hanging out with him again, and is also trying to start dating me which I am open to and even excited about but this is really bothering me. Should it?