What should I do? MIL narcissism

My MIL is a narcissist. This weekend she screamed at me “SHUT UP! SHUT UP!” And raised her fist in a fake out punch motion like she was going to hit me, while I was holding my baby. My entire in laws are gaslighting me to just let her come back over to my house but I told her and them that I never want to see her again. My husband is fuming pissed at ME. He saw her threaten to punch me and he thinks it’s my fault for making her so upset because I asked her to leave my house when she was being disrespectful to me. She has done dangerous things that could have killed my son like leave him on a bar height changing table and walking off like she had set him down for a nap. She screamed at me and denied it when I tried talking to her about her unsafe behaviors as a caregiver. She says it’s “impossible” for her to make mistakes because she’s raised kids in the past. It makes me despise her now. I’ll never forget her childish screaming and the scary threat with my BABY.

His whole family is gaslighting me and they’re already trying to force me to let her see my son again and asking to “repair the damage” with her.

Please go easy on me, I’ve had a hard time dealing with this and I just want some advice and some compassionate listeners, please.