It is inappropriate to call family pieces of shit.
Molly is at Thanksgiving dinner, listening to her relatives champion political ideology she firmly disagrees with.
Molly wants to tell her family members that she disagrees with their politics.
Molly tells her family that everyone is entitled to their political opinions but that she doesn't believe they're right.
Molly tells her family that because of what they believe politically she thinks they're pieces of shit.
Molly's family decides not to talk politics anymore and instead starts serving the pumpkin pie.
Molly's family is very insulted and refuses to invite Molly for Thanksgiving dinner next year.