Add to that, clearly those "bad parents" are the result of bad parenting in the first place, so really it's the grand parents that are to blame...

Wait, those grand parents also had bad models to work with, so really it's the great grandparents that were to blame...

No, wait, it was the society that they grew up in that encouraged poor behaviour toward them, and forced them to react by taking on toxic behaviours. We all should pay because we all actively contribute to the world around us, and that includes being silent when we see bad things happening.