The process to which your wife is being subjected is designed to humiliate. Every day she and her history remains under scrutiny is an additional outrage. How can anyone want to continue to have anything to do with people who want to do that to you? Sometimes you just have to know when you're knackered, as Miriam is fond of telling me!
The only satisfaction for her would be, if by a miracle she gets told she can stay in the party, to send in the shreds of her membership card.
My aunt Irene and her husband were expelled from the Labour party in the 1950s for raising the red flag over St.Pancras (now Camden) town hall. (A fine precedent for the newfangled picking on the wrong sort of 'Jewish' people as it so happens) I'm not sure if they ever went back...