I need advice!

So my mom and husband hates each other. My mom said some very harsh words toward him and me about a year ago and we haven’t talked to her since. My husband blocked her from my social media sights. Well recently I have wanted my mom back into my life. I told my husband that I unblocked her and he got extremely pissed off about it. Saying that “I shouldn’t allowed toxic people in our life” well things escalated and idk what to do. He has given her 3 chances and she blew all of them. I miss my Mom but I also don’t want my husband to feel like I am betraying him if I talk to her. What do I do?