Sorry to return to the topic of Karla, but couldn't resist mentioning that there are some FN supporters on Twitter saying that of course her grandparents were Jewish - they had to flee from the Holocaust.
One must admire the degree of foresight on their part: "Let's get out while Hitler is barely 21 years old; it will be over two decades until he first becomes Chancellor and WW II follows. And, conveniently, we also will miss WW I when it starts a few years from now."
Perhaps Doug's father helped them swim across the ocean to safety.