I have seen so many threads where the MIL's or DM's actions seem to be perfectly reasonable (or at least open to interpretation) yet they are accused of committing a heinous crime or they have all sorts of unkind motives attributed to them by angry, self-righteous daughters/daughters in law.
Also, there is a general assumption that DMs/MILs want to control or interfere all the time in their DC's/DGC's lives. Or always want to be with them. On the other hand, if the DM/MIL keep their distance they are accused of being uninterested and neglecting their grandparental duties. They can't win!
Is this attitude a transference of general misogyny in culture at large? Unconsciously adopted by younger women? Or is it more personal than that - younger women feel threatened and that their 'power' and authority is being undermined by older women?