Advice on mom not seeing kids

How would you go about this? My brother and I had a falling out over blm and him saying racist shit (we are black) and my mom took his side and cut me off. We exchanged one text where I basically said he came at me first , bye mom.

And that was it she never spoke to me again lol it’s been about a month. She lives about 4 hrs away and She came to visit my other brother who literally lives across the street. I can see his house from my house and she hasn’t asked to see my baby or toddler. I get you’re mad at me but to not care enough about seeing your grandkids? I’m salty. She’s had this problem before with my SIL , not calling or seeing them for months. I’m not sure what to do. This feels unforgivable.