MIL won’t come to see grand daughter

Long story short :

My SIL kept crossing the lines with her mouth. I put her (47 yo mother of two) in her place (approximately 3 months ago)

MIL made me (32 yo) their enemy instead of teaching her daughter some manners.

Now I hear my husband begging his mom to come over to see our one year old. (Bro she doesn’t want to come over)

My question to you:

Wtf .. is MIL’s blind faith and following of her evil daughter worth not having a relationship with a new grand baby? Hurting your sons feelings?

Is her hate for me so great , that she can’t be cordial for a few hours?

For 3 years, I have been nothing but well mannered, respectful, and kind to these ppl. As God is my witness.

My mother father and brother have been nothing but be respectful to my in laws. It’s gotten to the point to where my mom won’t even defend them. And she always see good in everyone!

I refuse to visit the MILs house cause SIL took over the place with her kids and lives their. (SIL has 4 houses, and still won’t let us have a few hours with MIL) SHE IS SO LOUD AND YELLS AT KIDS ALL THE TIME. “Eat your effin food!!” Idiots losers all kinds of names. And they are 9 and 4...

What would you do?