when a parentor primary caregiver does this it causes children harm. Your MIL is not your children’s primary caregiver, it won’t cause them any harm at all. It’s perfectly normal for extended family members to have different levels of relationship that vary in closeness, that’s life.
Bullshit, having a family member who engages in overt favouritism absolutely inflicts psychological harm. Having a member of your own family make clear that they dislike you as a child, or that they consider you lesser than other children in the family, can be damaging enough to count as emotional abuse.
There's a massive difference between naturally having different levels of closeness depending on practical factors (for example, a grandparent who has one grandkid living on the same street and another grandkid living in Australia) and a grandparent who engages in overt favouritism (for example, treating all grandsons like princes and all granddaughters like crap, or treating all the offspring of the golden child well and all offspring of the scapegoat child badly). No one is talking about the former.
It's also quite hypocritical how grandparents are essential close family members when denied access to adorable ickle babies, yet simultaneously such distant relatives that emotional abuse is no biggie.
I don’t think DIL’s need to have a close relationship with their MIL’s, I do think they should be willing to facilitate their children to build a relationship with their grandparents and vice versa
If the MIL hasn't bothered to treat their DIL politely then that job should fall to the son.
The power of the DiL to dictate her baby's relationships is a matter of fact that doesn't need stating to most MiL
I don't think it is a matter of fact, most people seem to think that women really don't have any automatic right or say over their own baby. In a lot of cultures, the mother of a man is the matriarch of the family and the DIL answers to her. Certainly on here, there's no end of stories of women being outraged and furious at being asked to not march in to their son&DIL's home whenever they want, not grab the baby whenever they want, not go into their son&DIL's bedroom and root around uninvited, etc.
There are a lot of women who regard DILs as nothing more than walking incubators and taken aback at the concept of them being actual human beings.