If your mother-in-law gave your 3 year old nurse maid's elbow for a third tame, would you say going low contact is extreme?

My mother-in-law has ALWAYS reeded on my daughter's arms. She used to pull her up as a baby and I told her don't do that because it's bad for her. She stopped, but then did it behind my back and my daughter got her first elbow dislocated at 10 months.

She felt really bad about it and I said, while panicking, that this is exactly why I told her to stop. I had to apologise later for making her feel guilty and like this was her fault. I don't agree with it but that's what had to be done.

Then a year later we were outside and she was swinging my daughter around in the backyard and I told her that she can't do that because she'll dislocate her elbow again. She stopped, but then like an hour later I had to go say goodbye to my sister-in-law and my mother-in-law swung her again and dislocated her elbow (same one) while I was saying goodbye to my sister-in-law.

I got so mad but everyone was like accidents happen and all that. I was like no, first one might have been an accident but I told her to stop already. This one is a choice.

We had a really rocky relationship until this year. We finally started seeing my in-laws again and last night they watched my daughter for the first time in over a year. While they were watching her, my in-laws went for a walk each holding one of my daughter's hands and were swinging her by her arms. This time her other elbow dislocated.

I said that's it. This is insane. Three times?!?! No. No more unsupervised visits. My husband is like it's really harsh to do that but I said what about our daughter?! They hurt her every time they have a second alone with her. They have been told over and over and over and over not to swing her by her arms. They're the only ones who keep dislocating her elbows. This is not a kid being a kid. These are adults knowing they shouldn't do something and doing it anyway.

My husband feels like there's got to be something wrong with our daughter because he remembers doing this all the time as a kid and not having any issues. The doctor told us the first and second time not to swing our daughter by her arms. The only thing wrong is that idiots keep swinging her by her arms. She has no signs of anything wrong with her and after the second time we got some testing, but she is completely normal.

Do you think going low contact for this is extreme?! Or am I somehow in the wrong here?