On the FHFA Suing Banks over Mortgage Backed Securities

Why is it that I keep picturing the three Stooges slapping each other silly when I think about the FHFA suing the big banks over mortgages.

Shouldn't they be including the credit rating agencies in this slap fest?

Did Congress and other politicians (like Cuomo) not press Fannie and Freddie to lower their underwriting standards to make home ownership available to more Americans? Should FHFA sue Congress?

Doesn't Fannie and Freddie have their own automated underwriting systems and standards? Wouldnt Fannie and Freddie KNOW the quality of mortgages that were being originated (with exception to fraud)?

Let the slappin' begin.