"You dare!" Grandma yelled, "They're our inlaws! They're family!"
"I will not marry scum!" She said. "And how did they survive so intact under Fargo's reign? Knowing how they are still alive and complete, I can only imagine what they sacrificed!"
Winona was quite accurate about this. This family survived by pandering to Fargo. They were basically spies and tattletales among the masses. The number of people who 'went missing' after information from them was easily a few dozen.
Some of them didn't even do anything wrong. They just annoyed one of the members of the family, and were framed enough to lose their lives.
However, they were sly enough not to be open about it, and they were lucky those who knew had perished in the war, so their entire family was safe from the purging Althea did in Fargo back then.