This annoys me too. In years gone by you tolerated your ils, unless of course they were really bad.
We are all different and I find it so sad that the first response seems to be go nc. I'm sure some of the dils wouldn't like it if their dh suggested they were nc with their mother over something trivial.
All this it's his mother let him deal with it crap, like they don't have a bloody voice themselves.
My dils are brilliant and will talk to me not have to go via my sons.